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vb.net : Setting the Text property to an empty string sets the SelectedIndex to -1
I let the use modify the text of a combobox and then I replace the selected
item with the new text (in Keyup event). But if he sets the Text property to an empty string ("") that sets the SelectedIndex to -1. Do you have any suggestion for getting around this problem? Thanks
Hi,
Without telling us how you use the combobox, it seems for me almost impossible that you get a right answer (you never know some people can win millions in a lottery). A combobox has a lot of combinations how to use it. Cor
It looks like expected to me as SelectedIndex indicates which entry in the
list is selected (-1 if none). You could set the index to the empty string item (if you have one ?) if you really need to have something selected. Note also that depending on what you are trying to do, you could perhaps also use a texbox with AutoCompletion capabilities (new in 2.0)... -- Patrice "Academia" <academiaNOSPAM@a-znet.com> a écrit dans le message de news: efWcb2mGIHA.4196@TK2MSFTNGP04.phx.gbl... [quoted text, click to view] >I let the use modify the text of a combobox and then I replace the selected >item with the new text (in Keyup event). > > But if he sets the Text property to an empty string ("") that sets the > SelectedIndex to -1. > > Do you have any suggestion for getting around this problem? > > > > Thanks >
[quoted text, click to view] "Patrice" <http://www.chez.com/scribe/> wrote in message news:OvpWHouGIHA.2540@TK2MSFTNGP05.phx.gbl... > It looks like expected to me as SelectedIndex indicates which entry in the > list is selected (-1 if none). You could set the index to the empty string > item (if you have one ?) if you really need to have something selected. DropDownStyle is DropDown AutoCompleteMode is None I need to know which item is selected when the user changes the text box so that I can then replaced the selected entry's text with the user input. But if while he is typing he clears the box the selectedIndex changes to -1. I can't figure why they change the SelectedIndex because the text box has changed. Can you? Does the textbox drive the selection in some way? I know selecting can fill the textbox but can changing text box change the SelectionIndex? I tried saving SelectedIndex and resetting it but I think that may cause side effects such as raised events. Thanks [quoted text, click to view] > > Note also that depending on what you are trying to do, you could perhaps > also use a texbox with AutoCompletion capabilities (new in 2.0)... > > -- > Patrice > > "Academia" <academiaNOSPAM@a-znet.com> a écrit dans le message de news: > efWcb2mGIHA.4196@TK2MSFTNGP04.phx.gbl... >>I let the use modify the text of a combobox and then I replace the >>selected item with the new text (in Keyup event). >> >> But if he sets the Text property to an empty string ("") that sets the >> SelectedIndex to -1. >> >> Do you have any suggestion for getting around this problem? >> >> >> >> Thanks >> > >
DropDownStyle is DropDown AutoCompleteMode is None I need to know which item is selected when the user changes the text box so that I can then replaced the selected entry's text with the user input. But if while he is typing he clears the box the selectedIndex changes to -1. I can't figure why they change the SelectedIndex because the text box has changed. Can you? Does the textbox drive the selection in some way? I know selecting can fill the textbox but can changing text box change the SelectionIndex? I tried saving SelectedIndex and resetting it but I think that may cause side effects such as raised events. Thanks This is a copy of text sent in reply to a different responder. I don't know if responders always read replies to other responders. [quoted text, click to view] "Cor Ligthert[MVP]" <notmyfirstname@planet.nl> wrote in message news:C858E65D-0DCF-45BB-A871-57CC84516E98@microsoft.com... > Hi, > > Without telling us how you use the combobox, it seems for me almost > impossible that you get a right answer (you never know some people can win > millions in a lottery). > > A combobox has a lot of combinations how to use it. > > Cor
AFAIK the dropdowncontrol works this way (with the DropDown style) :
- either the user selects an entry in the list and the selectedindex is then the index of the selected item - if the user enters some text, then by definition he didn't select an item so selectedindex is -1 If you want the dropdown style use the Text property to know the value of the selected entry or the text entered by the user (that match or not a possible entry). If you want to constraint the user to one of those entries, use the DropDownList style. You could check yourself to which entry the text entered by the user match and reselect the corresponding item but it wuld defeat the purpose of the dropdown style and of course it could match or not depending on what the user entered. For now I'm not sure to understand. You may want to explain what you want to do (that is to let the user select between several items or only those or to let the user select between items OR enter some text freely that could match or not one of these items). -- Patrice "Academia" <academiaNOSPAM@a-znet.com> a écrit dans le message de news: eQveIbvGIHA.3768@TK2MSFTNGP06.phx.gbl... [quoted text, click to view] > > "Patrice" <http://www.chez.com/scribe/> wrote in message > news:OvpWHouGIHA.2540@TK2MSFTNGP05.phx.gbl... >> It looks like expected to me as SelectedIndex indicates which entry in >> the list is selected (-1 if none). You could set the index to the empty >> string item (if you have one ?) if you really need to have something >> selected. > > DropDownStyle is DropDown > AutoCompleteMode is None > > I need to know which item is selected when the user changes the text box > so that I can then replaced the selected entry's text with the user input. > But if while he is typing he clears the box the selectedIndex changes > to -1. I can't figure why they change the SelectedIndex because the text > box has changed. Can you? > > Does the textbox drive the selection in some way? I know selecting can > fill the textbox but can changing text box change the SelectionIndex? > > I tried saving SelectedIndex and resetting it but I think that may cause > side effects such as raised events. > > Thanks > >> >> Note also that depending on what you are trying to do, you could perhaps >> also use a texbox with AutoCompletion capabilities (new in 2.0)... >> >> -- >> Patrice >> >> "Academia" <academiaNOSPAM@a-znet.com> a écrit dans le message de news: >> efWcb2mGIHA.4196@TK2MSFTNGP04.phx.gbl... >>>I let the use modify the text of a combobox and then I replace the >>>selected item with the new text (in Keyup event). >>> >>> But if he sets the Text property to an empty string ("") that sets the >>> SelectedIndex to -1. >>> >>> Do you have any suggestion for getting around this problem? >>> >>> >>> >>> Thanks >>> >> >> > >
Just filling the itemcollection with strings. Then the user can select an
item which puts it into the textbox so the user can modify it. As he changes the text in the textbox KeyUp changes the SelectedItem's text. But if he clears the textbox while changing it, the selectedindex no longer points to the item being worked on. thanks [quoted text, click to view] "Cor Ligthert[MVP]" <notmyfirstname@planet.nl> wrote in message news:CCCBBF97-3F30-4BBB-B56F-9B6E245A1232@microsoft.com... > Academia, > > I mean, are you using a datasource with a datamember and a displaymember > or are you just filling the itemcollection in the combobox? > > Cor
I fill the itemcollection with strings. Then the user can select an item
which puts it into the textbox so the user can modify it. As he changes the text in the textbox KeyUp changes the SelectedItem's text. But if he clears the textbox while changing it, the selectedindex no longer points to the item being worked on. Briefly, I want the user to be able to update any item in the conbobox's itemcollection. thanks [quoted text, click to view] "Patrice" <http://www.chez.com/scribe/> wrote in message news:OJiY31vGIHA.4712@TK2MSFTNGP04.phx.gbl... > AFAIK the dropdowncontrol works this way (with the DropDown style) : > - either the user selects an entry in the list and the selectedindex is > then the index of the selected item > - if the user enters some text, then by definition he didn't select an > item so selectedindex is -1 > > If you want the dropdown style use the Text property to know the value of > the selected entry or the text entered by the user (that match or not a > possible entry). > > If you want to constraint the user to one of those entries, use the > DropDownList style. > > You could check yourself to which entry the text entered by the user match > and reselect the corresponding item but it wuld defeat the purpose of the > dropdown style and of course it could match or not depending on what the > user entered. > > For now I'm not sure to understand. You may want to explain what you want > to do (that is to let the user select between several items or only those > or to let the user select between items OR enter some text freely that > could match or not one of these items). > > -- > Patrice > > "Academia" <academiaNOSPAM@a-znet.com> a écrit dans le message de news: > eQveIbvGIHA.3768@TK2MSFTNGP06.phx.gbl... >> >> "Patrice" <http://www.chez.com/scribe/> wrote in message >> news:OvpWHouGIHA.2540@TK2MSFTNGP05.phx.gbl... >>> It looks like expected to me as SelectedIndex indicates which entry in >>> the list is selected (-1 if none). You could set the index to the empty >>> string item (if you have one ?) if you really need to have something >>> selected. >> >> DropDownStyle is DropDown >> AutoCompleteMode is None >> >> I need to know which item is selected when the user changes the text box >> so that I can then replaced the selected entry's text with the user >> input. But if while he is typing he clears the box the selectedIndex >> changes to -1. I can't figure why they change the SelectedIndex because >> the text box has changed. Can you? >> >> Does the textbox drive the selection in some way? I know selecting can >> fill the textbox but can changing text box change the SelectionIndex? >> >> I tried saving SelectedIndex and resetting it but I think that may cause >> side effects such as raised events. >> >> Thanks >> >>> >>> Note also that depending on what you are trying to do, you could perhaps >>> also use a texbox with AutoCompletion capabilities (new in 2.0)... >>> >>> -- >>> Patrice >>> >>> "Academia" <academiaNOSPAM@a-znet.com> a écrit dans le message de news: >>> efWcb2mGIHA.4196@TK2MSFTNGP04.phx.gbl... >>>>I let the use modify the text of a combobox and then I replace the >>>>selected item with the new text (in Keyup event). >>>> >>>> But if he sets the Text property to an empty string ("") that sets the >>>> SelectedIndex to -1. >>>> >>>> Do you have any suggestion for getting around this problem? >>>> >>>> >>>> >>>> Thanks >>>> >>> >>> >> >> > >
Academia,
I mean, are you using a datasource with a datamember and a displaymember or are you just filling the itemcollection in the combobox? Cor
When the value of the Text property of a ComboBox control, (DropDown style),
EXACTLY matches an entry in the Items property then the SelectedIndex property reflects the ordinal position of that entry in the Items property and the SelectedItem reflects that entry. When the value of the Text property of a ComboBox control, (DropDown style), boes NOT EXACTLY match any entries in the Items property then the SelectedIndex property is -1 and the SelectedItem property is Nothing. You will be aware, (or you should be), that when you change selections, the SelectedIndexChanged event is raised twice. The first time is when the current item becomes unselected (SelectedIndex = -1 and SelectedItem Is Nothing). The second time is when the new item becomes selected (SelectedIndex = <ordinal position> and SelectedItem Is <item>. When you attempt to use the Text property in the manner you appear to be describing you must forget about using the KeyDown and KeyUp events and instead react to a signal that the user has finished typing what he wants to type. This is easily down by using the Enter (Return) key and trapping it in the KeyPress event. In that event handler you need to locate the value of the Text property in the Items property and set the SelectedIndex or SelectedItem accordingly. You will, of course need to add any necessary code to take care of any case sensitivity/insensitivity issues introduced by your business rules. This, of course, is all very well for selecting items, but what about renaming an existing selection. This can get complicated because you have to know whetehr your user is typing to locate an item or typing to rename an item. The Text property of the ComboBox is not well suited for this purpose. In my opinion, it would be better to have a seperate TextBox control for this purpose. [quoted text, click to view] "Academia" <academiaNOSPAM@a-znet.com> wrote in message
news:u0ZThf0GIHA.3548@TK2MSFTNGP06.phx.gbl... >I fill the itemcollection with strings. Then the user can select an item >which puts it into the textbox so the user can modify it. As he changes the >text in the textbox KeyUp changes the SelectedItem's text. But if he clears >the textbox while changing it, the selectedindex no longer points to the >item being worked on. > > Briefly, I want the user to be able to update any item in the conbobox's > itemcollection. > > thanks > > "Patrice" <http://www.chez.com/scribe/> wrote in message > news:OJiY31vGIHA.4712@TK2MSFTNGP04.phx.gbl... >> AFAIK the dropdowncontrol works this way (with the DropDown style) : >> - either the user selects an entry in the list and the selectedindex is >> then the index of the selected item >> - if the user enters some text, then by definition he didn't select an >> item so selectedindex is -1 >> >> If you want the dropdown style use the Text property to know the value of >> the selected entry or the text entered by the user (that match or not a >> possible entry). >> >> If you want to constraint the user to one of those entries, use the >> DropDownList style. >> >> You could check yourself to which entry the text entered by the user >> match and reselect the corresponding item but it wuld defeat the purpose >> of the dropdown style and of course it could match or not depending on >> what the user entered. >> >> For now I'm not sure to understand. You may want to explain what you want >> to do (that is to let the user select between several items or only those >> or to let the user select between items OR enter some text freely that >> could match or not one of these items). >> >> -- >> Patrice >> >> "Academia" <academiaNOSPAM@a-znet.com> a écrit dans le message de news: >> eQveIbvGIHA.3768@TK2MSFTNGP06.phx.gbl... >>> >>> "Patrice" <http://www.chez.com/scribe/> wrote in message >>> news:OvpWHouGIHA.2540@TK2MSFTNGP05.phx.gbl... >>>> It looks like expected to me as SelectedIndex indicates which entry in >>>> the list is selected (-1 if none). You could set the index to the empty >>>> string item (if you have one ?) if you really need to have something >>>> selected. >>> >>> DropDownStyle is DropDown >>> AutoCompleteMode is None >>> >>> I need to know which item is selected when the user changes the text box >>> so that I can then replaced the selected entry's text with the user >>> input. But if while he is typing he clears the box the selectedIndex >>> changes to -1. I can't figure why they change the SelectedIndex because >>> the text box has changed. Can you? >>> >>> Does the textbox drive the selection in some way? I know selecting can >>> fill the textbox but can changing text box change the SelectionIndex? >>> >>> I tried saving SelectedIndex and resetting it but I think that may cause >>> side effects such as raised events. >>> >>> Thanks >>> >>>> >>>> Note also that depending on what you are trying to do, you could >>>> perhaps also use a texbox with AutoCompletion capabilities (new in >>>> 2.0)... >>>> >>>> -- >>>> Patrice >>>> >>>> "Academia" <academiaNOSPAM@a-znet.com> a écrit dans le message de news: >>>> efWcb2mGIHA.4196@TK2MSFTNGP04.phx.gbl... >>>>>I let the use modify the text of a combobox and then I replace the >>>>>selected item with the new text (in Keyup event). >>>>> >>>>> But if he sets the Text property to an empty string ("") that sets the >>>>> SelectedIndex to -1. >>>>> >>>>> Do you have any suggestion for getting around this problem? >>>>> >>>>> >>>>> >>>>> Thanks >>>>> >>>> >>>> >>> >>> >> >> > >
[quoted text, click to view]
> Just filling the itemcollection with strings. Then the user can select an Seems to me exactly as it should be. The Index should then be -1.> item which puts it into the textbox so the user can modify it. As he > changes the text in the textbox KeyUp changes the SelectedItem's text. But > if he clears the textbox while changing it, the selectedindex no longer > points to the item being worked on. > However you can of course save forever the latest index as the textbox is not spaces. (The VB static declaration is great for that). Cor
Ah ok ! I didn't catch the unusal use of this dropdown.
You could just save the selected index (when the user selects an item) so that you can use this saved index when the user starts editing instead of using the ListIndex property that will now be latered by design. That said I would agreee with Stephany. Using the dropdown as a UI that allows to select and then edit an item is perhaps not that a good idea. I would also use a separate text box for editing... "Academia" <academiaNOSPAM@a-znet.com> a écrit dans le message de news: u0ZThf0GIHA.3548@TK2MSFTNGP06.phx.gbl... [quoted text, click to view] >I fill the itemcollection with strings. Then the user can select an item >which puts it into the textbox so the user can modify it. As he changes the >text in the textbox KeyUp changes the SelectedItem's text. But if he clears >the textbox while changing it, the selectedindex no longer points to the >item being worked on. > > Briefly, I want the user to be able to update any item in the conbobox's > itemcollection. > > thanks > > "Patrice" <http://www.chez.com/scribe/> wrote in message > news:OJiY31vGIHA.4712@TK2MSFTNGP04.phx.gbl... >> AFAIK the dropdowncontrol works this way (with the DropDown style) : >> - either the user selects an entry in the list and the selectedindex is >> then the index of the selected item >> - if the user enters some text, then by definition he didn't select an >> item so selectedindex is -1 >> >> If you want the dropdown style use the Text property to know the value of >> the selected entry or the text entered by the user (that match or not a >> possible entry). >> >> If you want to constraint the user to one of those entries, use the >> DropDownList style. >> >> You could check yourself to which entry the text entered by the user >> match and reselect the corresponding item but it wuld defeat the purpose >> of the dropdown style and of course it could match or not depending on >> what the user entered. >> >> For now I'm not sure to understand. You may want to explain what you want >> to do (that is to let the user select between several items or only those >> or to let the user select between items OR enter some text freely that >> could match or not one of these items). >> >> -- >> Patrice >> >> "Academia" <academiaNOSPAM@a-znet.com> a écrit dans le message de news: >> eQveIbvGIHA.3768@TK2MSFTNGP06.phx.gbl... >>> >>> "Patrice" <http://www.chez.com/scribe/> wrote in message >>> news:OvpWHouGIHA.2540@TK2MSFTNGP05.phx.gbl... >>>> It looks like expected to me as SelectedIndex indicates which entry in >>>> the list is selected (-1 if none). You could set the index to the empty >>>> string item (if you have one ?) if you really need to have something >>>> selected. >>> >>> DropDownStyle is DropDown >>> AutoCompleteMode is None >>> >>> I need to know which item is selected when the user changes the text box >>> so that I can then replaced the selected entry's text with the user >>> input. But if while he is typing he clears the box the selectedIndex >>> changes to -1. I can't figure why they change the SelectedIndex because >>> the text box has changed. Can you? >>> >>> Does the textbox drive the selection in some way? I know selecting can >>> fill the textbox but can changing text box change the SelectionIndex? >>> >>> I tried saving SelectedIndex and resetting it but I think that may cause >>> side effects such as raised events. >>> >>> Thanks >>> >>>> >>>> Note also that depending on what you are trying to do, you could >>>> perhaps also use a texbox with AutoCompletion capabilities (new in >>>> 2.0)... >>>> >>>> -- >>>> Patrice >>>> >>>> "Academia" <academiaNOSPAM@a-znet.com> a écrit dans le message de news: >>>> efWcb2mGIHA.4196@TK2MSFTNGP04.phx.gbl... >>>>>I let the use modify the text of a combobox and then I replace the >>>>>selected item with the new text (in Keyup event). >>>>> >>>>> But if he sets the Text property to an empty string ("") that sets the >>>>> SelectedIndex to -1. >>>>> >>>>> Do you have any suggestion for getting around this problem? >>>>> >>>>> >>>>> >>>>> Thanks >>>>> >>>> >>>> >>> >>> >> >> > >
[quoted text, click to view] "Cor Ligthert[MVP]" <notmyfirstname@planet.nl> wrote in message news:1BCF9096-0892-462A-8BCE-46E248E1910B@microsoft.com... >> Just filling the itemcollection with strings. Then the user can select an >> item which puts it into the textbox so the user can modify it. As he >> changes the text in the textbox KeyUp changes the SelectedItem's text. >> But if he clears the textbox while changing it, the selectedindex no >> longer points to the item being worked on. >> > Seems to me exactly as it should be. The Index should then be -1. > > However you can of course save forever the latest index as the textbox is > not spaces. (The VB static declaration is great for that). I do that now thanks [quoted text, click to view] > > Cor
Thanks for the complete answer.
I didn't know there was such a connection between the textbox and the items. I guess I assumed that selection meant the user clicked an item. Thanks [quoted text, click to view] "Stephany Young" <noone@localhost> wrote in message news:e0dbHu1GIHA.3600@TK2MSFTNGP06.phx.gbl... > When the value of the Text property of a ComboBox control, (DropDown > style), EXACTLY matches an entry in the Items property then the > SelectedIndex property reflects the ordinal position of that entry in the > Items property and the SelectedItem reflects that entry. > > When the value of the Text property of a ComboBox control, (DropDown > style), boes NOT EXACTLY match any entries in the Items property then the > SelectedIndex property is -1 and the SelectedItem property is Nothing. > > You will be aware, (or you should be), that when you change selections, > the SelectedIndexChanged event is raised twice. The first time is when the > current item becomes unselected (SelectedIndex = -1 and SelectedItem Is > Nothing). The second time is when the new item becomes selected > (SelectedIndex = <ordinal position> and SelectedItem Is <item>. > > When you attempt to use the Text property in the manner you appear to be > describing you must forget about using the KeyDown and KeyUp events and > instead react to a signal that the user has finished typing what he wants > to type. > > This is easily down by using the Enter (Return) key and trapping it in the > KeyPress event. > > In that event handler you need to locate the value of the Text property in > the Items property and set the SelectedIndex or SelectedItem accordingly. > > You will, of course need to add any necessary code to take care of any > case sensitivity/insensitivity issues introduced by your business rules. > > This, of course, is all very well for selecting items, but what about > renaming an existing selection. > > This can get complicated because you have to know whetehr your user is > typing to locate an item or typing to rename an item. The Text property of > the ComboBox is not well suited for this purpose. > > In my opinion, it would be better to have a seperate TextBox control for > this purpose. > > > "Academia" <academiaNOSPAM@a-znet.com> wrote in message > news:u0ZThf0GIHA.3548@TK2MSFTNGP06.phx.gbl... >>I fill the itemcollection with strings. Then the user can select an item >>which puts it into the textbox so the user can modify it. As he changes >>the text in the textbox KeyUp changes the SelectedItem's text. But if he >>clears the textbox while changing it, the selectedindex no longer points >>to the item being worked on. >> >> Briefly, I want the user to be able to update any item in the conbobox's >> itemcollection. >> >> thanks >> >> "Patrice" <http://www.chez.com/scribe/> wrote in message >> news:OJiY31vGIHA.4712@TK2MSFTNGP04.phx.gbl... >>> AFAIK the dropdowncontrol works this way (with the DropDown style) : >>> - either the user selects an entry in the list and the selectedindex is >>> then the index of the selected item >>> - if the user enters some text, then by definition he didn't select an >>> item so selectedindex is -1 >>> >>> If you want the dropdown style use the Text property to know the value >>> of the selected entry or the text entered by the user (that match or not >>> a possible entry). >>> >>> If you want to constraint the user to one of those entries, use the >>> DropDownList style. >>> >>> You could check yourself to which entry the text entered by the user >>> match and reselect the corresponding item but it wuld defeat the purpose >>> of the dropdown style and of course it could match or not depending on >>> what the user entered. >>> >>> For now I'm not sure to understand. You may want to explain what you >>> want to do (that is to let the user select between several items or only >>> those or to let the user select between items OR enter some text freely >>> that could match or not one of these items). >>> >>> -- >>> Patrice >>> >>> "Academia" <academiaNOSPAM@a-znet.com> a écrit dans le message de news: >>> eQveIbvGIHA.3768@TK2MSFTNGP06.phx.gbl... >>>> >>>> "Patrice" <http://www.chez.com/scribe/> wrote in message >>>> news:OvpWHouGIHA.2540@TK2MSFTNGP05.phx.gbl... >>>>> It looks like expected to me as SelectedIndex indicates which entry in >>>>> the list is selected (-1 if none). You could set the index to the >>>>> empty string item (if you have one ?) if you really need to have >>>>> something selected. >>>> >>>> DropDownStyle is DropDown >>>> AutoCompleteMode is None >>>> >>>> I need to know which item is selected when the user changes the text >>>> box so that I can then replaced the selected entry's text with the user >>>> input. But if while he is typing he clears the box the selectedIndex >>>> changes to -1. I can't figure why they change the SelectedIndex because >>>> the text box has changed. Can you? >>>> >>>> Does the textbox drive the selection in some way? I know selecting can >>>> fill the textbox but can changing text box change the SelectionIndex? >>>> >>>> I tried saving SelectedIndex and resetting it but I think that may >>>> cause side effects such as raised events. >>>> >>>> Thanks >>>> >>>>> >>>>> Note also that depending on what you are trying to do, you could >>>>> perhaps also use a texbox with AutoCompletion capabilities (new in >>>>> 2.0)... >>>>> >>>>> -- >>>>> Patrice >>>>> >>>>> "Academia" <academiaNOSPAM@a-znet.com> a écrit dans le message de >>>>> news: efWcb2mGIHA.4196@TK2MSFTNGP04.phx.gbl... >>>>>>I let the use modify the text of a combobox and then I replace the >>>>>>selected item with the new text (in Keyup event). >>>>>> >>>>>> But if he sets the Text property to an empty string ("") that sets >>>>>> the SelectedIndex to -1. >>>>>> >>>>>> Do you have any suggestion for getting around this problem? >>>>>> >>>>>> >>>>>> >>>>>> Thanks >>>>>> >>>>> >>>>> >>>> >>>> >>> >>> >> >> >
[quoted text, click to view] "Patrice" <http://www.chez.com/scribe/> wrote in message I didn't know there was such a connection between the textbox and the items.news:u6T%23CB6GIHA.700@TK2MSFTNGP05.phx.gbl... > Ah ok ! I didn't catch the unusal use of this dropdown. > > You could just save the selected index (when the user selects an item) so > that you can use this saved index when the user starts editing instead of > using the ListIndex property that will now be latered by design. > > That said I would agreee with Stephany. Using the dropdown as a UI that > allows to select and then edit an item is perhaps not that a good idea. > > I would also use a separate text box for editing... > I guess I assumed that selection meant the user clicked an item. I suppose I could use a Textbox with a ListBox to make my own ComboBox in which changing the textbox does not affect the selected index. I'm miss the Button with the unside-down ^ that users are use to seeing. Maybe I could generate a control inheriting ComboBox and override something to remove the behavior of changing selection when the textbox is changed. Got any suggestions? Thanks
Maybe I could generate a control inheriteing ComboBox and override someting
to remove the behavior of changing selection when the textbox is changed. Got any suggestions? thanks for the help
As already suggested you could just save the SelectedIndex value :
Dim SavedIndex As Integer = 0 Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load ComboBox1.Items.Add("") ComboBox1.Items.Add("ABC") ComboBox1.Items.Add("DEF") End Sub Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged SavedIndex = ComboBox1.SelectedIndex End Sub Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click ComboBox1.Items(SavedIndex) = ComboBox1.Text End Sub -- Patrice "Academia" <academiaNOSPAM@a-znet.com> a écrit dans le message de news: e%23p%23Gk%23GIHA.1164@TK2MSFTNGP02.phx.gbl... [quoted text, click to view] > Maybe I could generate a control inheriteing ComboBox and override > someting to remove the behavior of changing selection when the textbox is > changed. > > Got any suggestions? > > > thanks for the help > > >
And double check it doesn't create a confusing UI...
-- Patrice "Patrice" <http://www.chez.com/scribe/> a écrit dans le message de news: OdMl1HFIIHA.284@TK2MSFTNGP02.phx.gbl... [quoted text, click to view] > As already suggested you could just save the SelectedIndex value : > > Dim SavedIndex As Integer = 0 > > Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As > System.EventArgs) Handles MyBase.Load > > ComboBox1.Items.Add("") > > ComboBox1.Items.Add("ABC") > > ComboBox1.Items.Add("DEF") > > End Sub > > > > Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As System.Object, > ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged > > SavedIndex = ComboBox1.SelectedIndex > > End Sub > > Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As > System.EventArgs) Handles Button1.Click > > ComboBox1.Items(SavedIndex) = ComboBox1.Text > > End Sub > > > -- > Patrice > > "Academia" <academiaNOSPAM@a-znet.com> a écrit dans le message de news: > e%23p%23Gk%23GIHA.1164@TK2MSFTNGP02.phx.gbl... >> Maybe I could generate a control inheriteing ComboBox and override >> someting to remove the behavior of changing selection when the textbox is >> changed. >> >> Got any suggestions? >> >> >> thanks for the help >> >> >> > >
Thanks
Actually I did try your suggestion and it worked OK but I kept running into changing something ( can remember right now what they were) would causing an event to run that I didn't want run. So I'd create a Boolean field that could be used to prevent the code being executed and set that before I changed that thing. Then I tried generating a control inheriting ComboBox and overriding something to remove the behavior of changing selection when the textbox is changed. Actually that was what I was asking suggestions for. I tried things like Keyup. But couldn't get the effect I wanted. Next I created a control using a Textbox and a Listbox and that was straight forward and took very little code. So it took some time but I now know much more about what a ComboBox is used for. Thanks for your interest. [quoted text, click to view] "Patrice" <http://www.chez.com/scribe/> wrote in message news:%23O4HNJFIIHA.2268@TK2MSFTNGP02.phx.gbl... > And double check it doesn't create a confusing UI... > > -- > Patrice > > "Patrice" <http://www.chez.com/scribe/> a écrit dans le message de news: > OdMl1HFIIHA.284@TK2MSFTNGP02.phx.gbl... >> As already suggested you could just save the SelectedIndex value : >> >> Dim SavedIndex As Integer = 0 >> >> Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As >> System.EventArgs) Handles MyBase.Load >> >> ComboBox1.Items.Add("") >> >> ComboBox1.Items.Add("ABC") >> >> ComboBox1.Items.Add("DEF") >> >> End Sub >> >> >> >> Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As System.Object, >> ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged >> >> SavedIndex = ComboBox1.SelectedIndex >> >> End Sub >> >> Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As >> System.EventArgs) Handles Button1.Click >> >> ComboBox1.Items(SavedIndex) = ComboBox1.Text >> >> End Sub >> >> >> -- >> Patrice >> >> "Academia" <academiaNOSPAM@a-znet.com> a écrit dans le message de news: >> e%23p%23Gk%23GIHA.1164@TK2MSFTNGP02.phx.gbl... >>> Maybe I could generate a control inheriteing ComboBox and override >>> someting to remove the behavior of changing selection when the textbox >>> is changed. >>> >>> Got any suggestions? >>> >>> >>> thanks for the help >>> >>> >>> >> >> > >
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