GridView Control - EmptyDataTemplate - FindControl

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Cohete

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4 Posts

GridView Control - EmptyDataTemplate - FindControl

Jan 09, 2009 05:56 AM|Cohete|LINK

I was strugling to find a TextBox which resides in the EmtyDataTemplate of a Gridview within a FormView

Finaly found a decent way to grab the control so I though I should share it because I didn't find the apropriate answer while searching the Internet

<div mce_keep="true">Case one: the easy one</div>

You have a TextBox in the EmtpyDataTemplate and a clickable Button

<asp:TextBox ID="txtInfo" runat="server" />

<asp:Button ID="btn" runat="server" onclick="btn_Click" Text="Test" />

</EmptyDataTemplate>

-- you can easily reference the TextBox in the button's click event

protected void btn_Click(object sender, EventArgs e)

{

Button btn = (Button)sender;

TextBox txtInfo = (TextBox)btn.NamingContainer.FindControl("txtInfo");

}

as simple as that

<div mce_keep="true">Case two: the one that turned a little of my hairs grey, you don't have a control that fires an event you can trigger</div> <div mce_keep="true">

<asp:TextBox ID="txtInfo" runat="server" />

</EmptyDataTemplate>

The Gridview 'gvInternalInfo' resides in a FormView 'fvVerslag'

here is the Gridview

"gvInternalInfo" DataKeyNames="EVXMIID" runat="server" AutoGenerateColumns="False"
                                                            DataSourceID="odsVerslagInternalInfo" SkinID="KanoGrid" ShowFooter="True" Caption="Interne Informatie">
                                                            
                                                                "txtInfo" runat="server" TextMode="MultiLine" Rows="5" Width="650px">
                                                                "btn" runat="server" onclick="btn_Click" Text="Test">
                                                            
                                                            
                                                                "Interne Informatie" SortExpression="INFO" ItemStyle-Wrap="true">
                                                                    
                                                                        "txtInfo" runat="server" Text='<%# Bind("INFO") %>' Width="650px"
                                                                            TextMode="MultiLine" Rows="5">
                                                                    
                                                                        "Label1" runat="server" Text='<%# Bind("INFO") %>'>
                                                                    "True">
                                                                
                                                                "Wie" SortExpression="UPDATEDBY">
                                                                    
                                                                        "Label2" runat="server" Text='<%# Bind("UPDATEDBY") %>'>
                                                                
                                                                "Wanneer" SortExpression="DATEUPDATE">
                                                                    
                                                                        "Label3" runat="server" Text='<%# Bind("DATEUPDATE") %>'>

<asp:GridView ID="gvInternalInfo" DataKeyNames="EVXMIID" runat="server" AutoGenerateColumns="False"

DataSourceID="odsVerslagInternalInfo" SkinID="KanoGrid" ShowFooter="True" Caption="Interne Informatie">

<asp:TextBox ID="txtInfo" runat="server" />

</EmptyDataTemplate>

<asp:TemplateField HeaderText="Interne Informatie" SortExpression="INFO" ItemStyle-Wrap="true">

<asp:TextBox ID="txtInfo" runat="server" Text='<%# Bind("INFO") %>' Width="650px"

TextMode="MultiLine" Rows="5"></asp:TextBox></FooterTemplate>

<asp:Label ID="Label1" runat="server" Text='<%# Bind("INFO") %>'></asp:Label></ItemTemplate>

</asp:TemplateField>

<asp:TemplateField HeaderText="Wie" SortExpression="UPDATEDBY">

<asp:Label ID="Label2" runat="server" Text='<%# Bind("UPDATEDBY") %>'></asp:Label></ItemTemplate>

</asp:TemplateField>

<asp:TemplateField HeaderText="Wanneer" SortExpression="DATEUPDATE">

<asp:Label ID="Label3" runat="server" Text='<%# Bind("DATEUPDATE") %>'></asp:Label></ItemTemplate>

</asp:TemplateField>

</Columns>

</asp:GridView>

Now I needed the text of the txtInfo TextBox in the ItemUpdating event of fvVerslag

protected void fvVerslag_ItemUpdating(object sender, FormViewUpdateEventArgs e)

{

GridView gv = (GridView)fvVerslag.FindControl("gvInternalInfo");

GridViewRow gvr ;



if (gv.Rows.Count == 0)

{

Table tbl = (Table)gv.Controls[0];

gvr = (GridViewRow)tbl.Controls[0];

}

else {
// when there are rows returned you can reference the gridviewrow by grabbing the footerrow
gvr = (GridViewRow)gv.FooterRow;

}

TableCell cell = gvr.Cells[0];

TextBox txtInfo = (TextBox)cell.FindControl("txtInfo");

}