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asp.net datagrid control
group:Handling Events Of DataGrid Template Item Controls - UNANSWERED
asp.net datagrid control:
gain access to the CheckChanged event handler procedure that corresponds to that control? Thanks.
Hi Scott,
Thanks for your posting. I've also noticed your another thread in this group. As I've mentioned, if you want to attache event handler for the sub controls nested in the datagrid's TemplateColumn. We have following means: Add the "OnXXXX" = ... in the aspx page template or prgramly add the event handler in code behind, to make it more clearly, here is a simple demo page , you can have a look to see whether it helps. If you have any further questions, please feel free to pos there. Thanks. ===================aspx ============= <HTML> <HEAD> <title>codedemo</title> <meta content="Microsoft Visual Studio .NET 7.1" name="GENERATOR"> <meta content="C#" name="CODE_LANGUAGE"> <meta content="JavaScript" name="vs_defaultClientScript"> <meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema"> </HEAD> <body> <form id="Form1" method="post" runat="server"> <table width="100%" align="center"> <tr> <td><asp:datagrid id="dgMain" runat="server" AutoGenerateColumns="False"> <Columns> <asp:TemplateColumn HeaderText="Column Header"> <ItemTemplate> <asp:CheckBox id="chkStatic" Runat="server" AutoPostBack="True" Text="Static EventHandler" OnCheckedChanged="chkStatic_CheckedChanged"></asp:CheckBox> <asp:CheckBox id="chkDynamic" Runat="server" AutoPostBack="True" Text="Dynamic EventHandler" ></asp:CheckBox> </ItemTemplate> </asp:TemplateColumn> </Columns> </asp:datagrid></td> </tr> </table> </form> </body> </HTML> =========code behind================== public class codedemo : System.Web.UI.Page { protected System.Web.UI.WebControls.Label lblTitle; protected System.Web.UI.WebControls.Button Button1; protected System.Web.UI.WebControls.DataGrid dgMain; private void Page_Load(object sender, System.EventArgs e) { if(!IsPostBack) { string[] items = {"one","two","three","four","five","six"}; dgMain.DataSource= items; dgMain.DataBind(); } } #region Web Form Designer generated code override protected void OnInit(EventArgs e) { InitializeComponent(); base.OnInit(e); } private void InitializeComponent() { this.dgMain.ItemCreated += new System.Web.UI.WebControls.DataGridItemEventHandler(this.dgMain_ItemCreated); this.Load += new System.EventHandler(this.Page_Load); } #endregion protected void chkStatic_CheckedChanged(object sender, System.EventArgs e) { CheckBox chk = sender as CheckBox; DataGridItem item = chk.NamingContainer as DataGridItem; Response.Write("<br>chkStatic in GridItem " + item.ItemIndex + " is changed!"); } protected void chkDynamic_CheckedChanged(object sender, System.EventArgs e) { CheckBox chk = sender as CheckBox; DataGridItem item = chk.NamingContainer as DataGridItem; Response.Write("<br>chkDynamic in GridItem " + item.ItemIndex + " is changed!"); } private void dgMain_ItemCreated(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e) { if(e.Item.ItemType== ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem) { CheckBox chk = e.Item.Cells[0].FindControl("chkDynamic") as CheckBox; chk.CheckedChanged +=new EventHandler(chkDynamic_CheckedChanged); } } } ========================= Regards, Steven Cheng Microsoft Online Support Get Secure! www.microsoft.com/security (This posting is provided "AS IS", with no warranties, and confers no rights.)
I'm afraid this answer doesn't tell me much. I'm not interested in
ImageButtons, I need a checkbox. I need to know exactly *how* to get the CheckChanged event of the checkbox, not that I can get an event. Thank you. [quoted text, click to view] "Michael Tkachev" <m_tkachev@hotmail.com> wrote in message news:eOLYG$uyEHA.2016@TK2MSFTNGP15.phx.gbl... > If you added to the datagrid a checkbox, then datagrid can't get an event > this checkbox. But you can get an event of this chechbox. Also you can use > an ImageButton, and you can put on this button images like checkbox. Then > you will be able to get datagrid's event (OnItemCommand). > > "Scott M." <s-mar@nospam.nospam> wrote in message > news:%235uUZNsyEHA.1260@TK2MSFTNGP12.phx.gbl... >> If I place a checkbox control into a template column of a DataGrid, how >> do > I >> gain access to the CheckChanged event handler procedure that corresponds > to >> that control? >> >> Thanks. >> >> > >
Steven,
Can you give me a VB.NET example of what you have below in your code-behind? Thanks. [quoted text, click to view] "Steven Cheng[MSFT]" <v-schang@online.microsoft.com> wrote in message news:9Zs5yWvyEHA.3984@cpmsftngxa10.phx.gbl... > Hi Scott, > > Thanks for your posting. I've also noticed your another thread in this > group. As I've mentioned, if you want to attache event handler for the sub > controls nested in the datagrid's TemplateColumn. We have following means: > > Add the "OnXXXX" = ... in the aspx page template or prgramly add the > event handler in code behind, to make it more clearly, here is a simple > demo page , you can have a look to see whether it helps. If you have any > further questions, please feel free to pos there. Thanks. > > ===================aspx ============= > <HTML> > <HEAD> > <title>codedemo</title> > <meta content="Microsoft Visual Studio .NET 7.1" name="GENERATOR"> > <meta content="C#" name="CODE_LANGUAGE"> > <meta content="JavaScript" name="vs_defaultClientScript"> > <meta content="http://schemas.microsoft.com/intellisense/ie5" > name="vs_targetSchema"> > </HEAD> > <body> > <form id="Form1" method="post" runat="server"> > <table width="100%" align="center"> > <tr> > <td><asp:datagrid id="dgMain" runat="server" > AutoGenerateColumns="False"> > <Columns> > <asp:TemplateColumn HeaderText="Column Header"> > <ItemTemplate> > <asp:CheckBox id="chkStatic" Runat="server" AutoPostBack="True" > Text="Static EventHandler" > OnCheckedChanged="chkStatic_CheckedChanged"></asp:CheckBox> > <asp:CheckBox id="chkDynamic" Runat="server" AutoPostBack="True" > Text="Dynamic EventHandler" ></asp:CheckBox> > </ItemTemplate> > </asp:TemplateColumn> > </Columns> > </asp:datagrid></td> > </tr> > </table> > </form> > </body> > </HTML> > > =========code behind================== > > public class codedemo : System.Web.UI.Page > { > protected System.Web.UI.WebControls.Label lblTitle; > protected System.Web.UI.WebControls.Button Button1; > protected System.Web.UI.WebControls.DataGrid dgMain; > > private void Page_Load(object sender, System.EventArgs e) > { > if(!IsPostBack) > { > string[] items = {"one","two","three","four","five","six"}; > > dgMain.DataSource= items; > dgMain.DataBind(); > } > } > > #region Web Form Designer generated code > override protected void OnInit(EventArgs e) > { > > InitializeComponent(); > base.OnInit(e); > } > > private void InitializeComponent() > { > this.dgMain.ItemCreated += new > System.Web.UI.WebControls.DataGridItemEventHandler(this.dgMain_ItemCreated); > this.Load += new System.EventHandler(this.Page_Load); > > } > #endregion > > > > > > protected void chkStatic_CheckedChanged(object sender, System.EventArgs e) > { > CheckBox chk = sender as CheckBox; > DataGridItem item = chk.NamingContainer as DataGridItem; > > Response.Write("<br>chkStatic in GridItem " + item.ItemIndex + " is > changed!"); > } > > protected void chkDynamic_CheckedChanged(object sender, System.EventArgs > e) > { > CheckBox chk = sender as CheckBox; > DataGridItem item = chk.NamingContainer as DataGridItem; > > Response.Write("<br>chkDynamic in GridItem " + item.ItemIndex + " is > changed!"); > } > > private void dgMain_ItemCreated(object sender, > System.Web.UI.WebControls.DataGridItemEventArgs e) > { > if(e.Item.ItemType== ListItemType.Item || e.Item.ItemType == > ListItemType.AlternatingItem) > { > CheckBox chk = e.Item.Cells[0].FindControl("chkDynamic") as CheckBox; > chk.CheckedChanged +=new EventHandler(chkDynamic_CheckedChanged); > } > } > } > ========================= > > Regards, > > Steven Cheng > Microsoft Online Support > > Get Secure! www.microsoft.com/security > (This posting is provided "AS IS", with no warranties, and confers no > rights.) >
If you added to the datagrid a checkbox, then datagrid can't get an event
this checkbox. But you can get an event of this chechbox. Also you can use an ImageButton, and you can put on this button images like checkbox. Then you will be able to get datagrid's event (OnItemCommand). [quoted text, click to view] "Scott M." <s-mar@nospam.nospam> wrote in message news:%235uUZNsyEHA.1260@TK2MSFTNGP12.phx.gbl... > If I place a checkbox control into a template column of a DataGrid, how do I > gain access to the CheckChanged event handler procedure that corresponds to > that control? > > Thanks. > >
Hi Scott,
Thanks for your followup. I've made a VB.NET version of the demo page and pasted below, Also, here is a web page which can help convert C# code to vb.net. Thought it's not 100% accurate, but is sufficient for common convertion tasks: http://authors.aspalliance.com/aldotnet/examples/translate.aspx Hope also help. ================aspx===================== <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML> <HEAD> <title>CheckBoxGrid</title> <meta content="Microsoft Visual Studio .NET 7.1" name="GENERATOR"> <meta content="Visual Basic .NET 7.1" name="CODE_LANGUAGE"> <meta content="JavaScript" name="vs_defaultClientScript"> <meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema"> </HEAD> <body> <form id="Form1" method="post" runat="server"> <table width="100%" align="center"> <tr> <td><asp:datagrid id="dgMain" runat="server" AutoGenerateColumns="False"> <Columns> <asp:TemplateColumn> <ItemTemplate> <asp:CheckBox ID="chkStatic" Runat="server" AutoPostBack="True" Text="Static Event Handler" OnCheckedChanged="chkStatic_CheckedChanged"></asp:CheckBox> <asp:CheckBox ID="chkDynamic" Runat="server" AutoPostBack="True" Text="Dynamic Event Handler"></asp:CheckBox> </ItemTemplate> </asp:TemplateColumn> </Columns> </asp:datagrid></td> </tr> <tr> <td></td> </tr> </table> </form> </body> </HTML> =================vbnet code behind================ Public Class CheckBoxGrid Inherits System.Web.UI.Page #Region " Web Form Designer Generated Code " 'This call is required by the Web Form Designer. <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent() End Sub Protected WithEvents dgMain As System.Web.UI.WebControls.DataGrid 'NOTE: The following placeholder declaration is required by the Web Form Designer. 'Do not delete or move it. Private designerPlaceholderDeclaration As System.Object Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Init 'CODEGEN: This method call is required by the Web Form Designer 'Do not modify it using the code editor. InitializeComponent() End Sub #End Region Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load If Not IsPostBack Then Dim arrStr() As String = {"AAA", "BBB", "CCC", "DDD", "EEE", "FFF"} dgMain.DataSource = arrStr dgMain.DataBind() End If End Sub Protected Sub chkStatic_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Dim chk As CheckBox = sender Dim item As DataGridItem = chk.NamingContainer Response.Write("<br>chkStatic in GridItem " & item.ItemIndex & " is changed!") End Sub Protected Sub chkDynamic_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Dim chk As CheckBox = sender Dim item As DataGridItem = chk.NamingContainer Response.Write("<br>chkDynamic in GridItem " & item.ItemIndex & " is changed!") End Sub Private Sub dgMain_ItemCreated(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.DataGridItemEventArgs) Handles dgMain.ItemCreated If e.Item.ItemType = ListItemType.Item Or e.Item.ItemType = ListItemType.AlternatingItem Then Dim chk As CheckBox = e.Item.FindControl("chkDynamic") AddHandler chk.CheckedChanged, AddressOf chkDynamic_CheckedChanged End If End Sub End Class ===================================== Regards, Steven Cheng Microsoft Online Support Get Secure! www.microsoft.com/security (This posting is provided "AS IS", with no warranties, and confers no rights.)
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