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Turning buttons on and off in a gridview

I added a button column to the gridview. I populate the gridview with numbered code and then snap it to the grid.

I need now to look at the first data column and check if the text of the column is “NA” if the button in this column should be disabled .....

How can i do this? I fill in the data from the code, and the button is pre-added to the grid in the markup

<asp:GridView ID="GridView1" runat="server" OnRowCommand="GridView1_RowCommand"> <Columns> <asp:ButtonField Text="Delete" /> </Columns> </asp:GridView> GridView1.DataSource = dt; GridView1.DataBind();
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It is best to implement the OnDataBinding method for Button in TemplateColumn .

For instance:

 <asp:GridView ID="GridView1" runat="server" OnRowCommand="GridView1_RowCommand"> <Columns> <asp:TemplateField> <ItemTemplate> <asp:Button runat="server" ID="btnDelete" CommandName="Delete" Text="Delete" OnDataBinding="btnDelete_DataBinding" /> </ItemTemplate> </asp:TemplateField> </Columns> </asp:GridView>

Then in your code, follow your logic:

 protected void btnDelete_DataBinding(object sender, System.EventArgs e) { Button btn = (Button)(sender); btn.Enabled = !Eval("TheFieldInYourDataSourceToCompare").ToString().Equals("NA"); }

An advantage for this in this regard over other published answers:

  • There is no code in your markup
  • The code is localized in the Button control and can be reused if other Buttons require the same functionality.
  • Comparison with the value of the DataSource , not the visual result (this may be due to business logic for both rendering and validation).

Hope this helps.

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Try this in the DataBound event handler:

 protected void GridView1_DataBound(object sender, EventArgs e) { for (int i = 0; i < GridView1.Rows.Count; i++) { if (GridView1.Rows[i].Cells[1].Text == "NA") { // Disable the button } } }

This is just a general idea. You will need to change the code for your application.

Remember to add OnDataBound="GridView1_DataBound" to the layout for the GridView.

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Maybe something like this. Whether the button was a little different.

 <asp:GridView ID="GridView1" runat="server" OnRowCommand="GridView1_RowCommand"> <Columns> <asp:TemplateField> <ItemTemplate> <asp:Button runat="server" ID="Btn_Delete" CommandName="Delete" Text="delete" Enabled='<%# GridView1.Rows[0].Cells[1].Text != "NA" %>' /> </ItemTemplate> </asp:TemplateField> </Columns> </asp:GridView>

You most likely want Eval ("someColumn") instead of GridView1.Rows [0] .Cells [1] .Text

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Perhaps you can use OnRowDataBound = "GridViewRowEventHandler" to set the value to enable or disable?

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you can try from markup like

  <asp:TemplateField HeaderText="QA signature"> <EditItemTemplate> <asp:TextBox ID="TextBox2" runat="server" Text='<%# Bind("Column6") %>'></asp:TextBox> </EditItemTemplate> <ItemTemplate> <asp:Label ID="Label3" runat="server" Text='<%# Eval("Column6") %>' Visible='<%# Eval("Column6") != "" %>' ></asp:Label> <asp:Button ID="Button2" runat="server" Text="Sign Off" CssClass="cmdButton" Visible='<%# Eval("Column6") == "" %>' /> </ItemTemplate> </asp:TemplateField>
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