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dotnet windows forms databinding
group:Q: DataGrid [Attribute] ???
dotnet windows forms databinding:
I'm using a custom data source for my (WinForms) datagrid: public class MyDataSource : IList { public void AddRow(string firstName, string lastName); // ... } each row is a: public class MyDataRow { public string FirstName { get { return firstName; } } private string firstName; //... } Then: MyDataSource data = new MyDataSource(); data.AddRow("Bret", "Pehrson"); //... grid.DataSource = data; Now, everything displays fine in the DataGrid. I'm not using any designer or other parameters to set up the columns, just letting the data source and grid figure that out. The only problem that I have is that I want the DataGrid to display "First name" as the column header and not "FirstName" as is currently happening. What I'd hope would be possible is some attribute on the FirstName property that would specify the column name, something like [HeaderText("First name")] public string FirstName { get { return firstName; } } Is there such a beast? I've looked and looked, and can't find anything. I want all of this to be done in the code for the MyDataRow/MyDataSource class.
Does anyone have a comment on my question/issue? No responses because:
- don't understand what I need - never done what I need - isn't possible - don't care about this topic - ??? _ANY_ info would be greatly appreciated... [quoted text, click to view] Bret Pehrson wrote:
> > Question/issue: > > I'm using a custom data source for my (WinForms) datagrid: > > public class MyDataSource : IList > { > public void AddRow(string firstName, string lastName); > // ... > } > > each row is a: > > public class MyDataRow > { > public string FirstName > { > get { return firstName; } > } > private string firstName; > //... > } > > Then: > > MyDataSource data = new MyDataSource(); > data.AddRow("Bret", "Pehrson"); > //... > > grid.DataSource = data; > > Now, everything displays fine in the DataGrid. I'm not using any designer or > other parameters to set up the columns, just letting the data source and grid > figure that out. The only problem that I have is that I want the DataGrid to > display "First name" as the column header and not "FirstName" as is currently > happening. > > What I'd hope would be possible is some attribute on the FirstName property > that would specify the column name, something like > > [HeaderText("First name")] > public string FirstName > { > get { return firstName; } > } > > Is there such a beast? I've looked and looked, and can't find anything. I > want all of this to be done in the code for the MyDataRow/MyDataSource class. >
[quoted text, click to view]
"Bret Pehrson" <bret@classicade.com> wrote in message news:41C9B9CE.973BB8FF@classicade.com... > Does anyone have a comment on my question/issue? No responses because: > > - don't understand what I need > > - never done what I need > > - isn't possible Isn't possible, as far as I know, unless you use a DataTable. John Saunders
Why not use a DataGridTableStyle?
-- Manohar Kamath Editor, .netWire www.dotnetwire.com [quoted text, click to view] "Bret Pehrson" <bret@classicade.com> wrote in message news:41C88A51.928DC825@classicade.com... > Question/issue: > > I'm using a custom data source for my (WinForms) datagrid: > > public class MyDataSource : IList > { > public void AddRow(string firstName, string lastName); > // ... > } > > each row is a: > > public class MyDataRow > { > public string FirstName > { > get { return firstName; } > } > private string firstName; > //... > } > > Then: > > MyDataSource data = new MyDataSource(); > data.AddRow("Bret", "Pehrson"); > //... > > grid.DataSource = data; > > > Now, everything displays fine in the DataGrid. I'm not using any designer or > other parameters to set up the columns, just letting the data source and grid > figure that out. The only problem that I have is that I want the DataGrid to > display "First name" as the column header and not "FirstName" as is currently > happening. > > What I'd hope would be possible is some attribute on the FirstName property > that would specify the column name, something like > > [HeaderText("First name")] > public string FirstName > { > get { return firstName; } > } > > Is there such a beast? I've looked and looked, and can't find anything. I > want all of this to be done in the code for the MyDataRow/MyDataSource class. > > Thanks
[quoted text, click to view]
Manohar Kamath wrote: > > Why not use a DataGridTableStyle? Because I want to affect the change through the class/data (domain-level object) rather than the grid (presentation layer). In my mind, it seems that it would be appropriate if the DataGrid control to use attributes on the data itself for some of the display characteristics. In my case, column name is a good example, as is numeric formatting, etc. Implementation of this feature would be trivial within the DataGrid, but obviously didn't happen as I haven't been able to locate anything on it, and no one has indicated otherwise. [quoted text, click to view] >
> -- > Manohar Kamath > Editor, .netWire > www.dotnetwire.com > > "Bret Pehrson" <bret@classicade.com> wrote in message > news:41C88A51.928DC825@classicade.com... > > Question/issue: > > > > I'm using a custom data source for my (WinForms) datagrid: > > > > public class MyDataSource : IList > > { > > public void AddRow(string firstName, string lastName); > > // ... > > } > > > > each row is a: > > > > public class MyDataRow > > { > > public string FirstName > > { > > get { return firstName; } > > } > > private string firstName; > > //... > > } > > > > Then: > > > > MyDataSource data = new MyDataSource(); > > data.AddRow("Bret", "Pehrson"); > > //... > > > > grid.DataSource = data; > > > > > > Now, everything displays fine in the DataGrid. I'm not using any designer > or > > other parameters to set up the columns, just letting the data source and > grid > > figure that out. The only problem that I have is that I want the DataGrid > to > > display "First name" as the column header and not "FirstName" as is > currently > > happening. > > > > What I'd hope would be possible is some attribute on the FirstName > property > > that would specify the column name, something like > > > > [HeaderText("First name")] > > public string FirstName > > { > > get { return firstName; } > > } > > > > Is there such a beast? I've looked and looked, and can't find anything. > I > > want all of this to be done in the code for the MyDataRow/MyDataSource > class. > >
This article may give you some thoughts on how this can be accomplished,
however, I'm not sure if it goes all the way. http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnadvnet/html/vbnet08262002.asp I assume you could just use reflection to get the attributes of each property and then build out DataGridTableStyles. -- Tom Krueger My Blog - http://weblogs.asp.net/tom_krueger Smart Client DevCenter - http://msdn.microsoft.com/smartclient/ Mobile DevCenter - http://msdn.microsoft.com/mobility This posting is provided "as is" with no warranties and confers no rights. [quoted text, click to view] "Bret Pehrson" <bret@classicade.com> wrote in message news:41D07C0A.F761ADA1@classicade.com... > Manohar Kamath wrote: >> >> Why not use a DataGridTableStyle? > > Because I want to affect the change through the class/data (domain-level > object) rather than the grid (presentation layer). > > In my mind, it seems that it would be appropriate if the DataGrid control > to > use attributes on the data itself for some of the display characteristics. > In > my case, column name is a good example, as is numeric formatting, etc. > > Implementation of this feature would be trivial within the DataGrid, but > obviously didn't happen as I haven't been able to locate anything on it, > and no > one has indicated otherwise. > > >> >> -- >> Manohar Kamath >> Editor, .netWire >> www.dotnetwire.com >> >> "Bret Pehrson" <bret@classicade.com> wrote in message >> news:41C88A51.928DC825@classicade.com... >> > Question/issue: >> > >> > I'm using a custom data source for my (WinForms) datagrid: >> > >> > public class MyDataSource : IList >> > { >> > public void AddRow(string firstName, string lastName); >> > // ... >> > } >> > >> > each row is a: >> > >> > public class MyDataRow >> > { >> > public string FirstName >> > { >> > get { return firstName; } >> > } >> > private string firstName; >> > //... >> > } >> > >> > Then: >> > >> > MyDataSource data = new MyDataSource(); >> > data.AddRow("Bret", "Pehrson"); >> > //... >> > >> > grid.DataSource = data; >> > >> > >> > Now, everything displays fine in the DataGrid. I'm not using any >> > designer >> or >> > other parameters to set up the columns, just letting the data source >> > and >> grid >> > figure that out. The only problem that I have is that I want the >> > DataGrid >> to >> > display "First name" as the column header and not "FirstName" as is >> currently >> > happening. >> > >> > What I'd hope would be possible is some attribute on the FirstName >> property >> > that would specify the column name, something like >> > >> > [HeaderText("First name")] >> > public string FirstName >> > { >> > get { return firstName; } >> > } >> > >> > Is there such a beast? I've looked and looked, and can't find >> > anything. >> I >> > want all of this to be done in the code for the MyDataRow/MyDataSource >> class. >> > >> > Thanks
[quoted text, click to view]
Tom Krueger [MSFT] wrote: > This article may give you some thoughts on how this can be accomplished, > however, I'm not sure if it goes all the way. > http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnadvnet/html/vbnet08262002.asp > > I assume you could just use reflection to get the attributes of each > property and then build out DataGridTableStyles. > I ended up implementing this myself using custom attributes applied to the underlying data classes. I overrode the DataSource proper setter on the grid, and scan the incoming data source for my attributes. When found, I simply modify the column characteristics. It turned out to be fairly simple to implement, and hugely powerful in that I don't have to write any grid interface code at all for my custom data sources.
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