How to hide button in GridView?

[pavlenych]

Hello all!

Simple question as always, but i can't find question.

I need to hide some Button, but it doesn't work.

ASPX:

<asp:ButtonField buttontype="Button" commandname="AddCustomValue" headertext="" Text="ButtonText" />

ASPX.CS:

foreach (GridViewRow gr in gvQuota.Rows)
{

Button buttonFromGV= (Button )gr.FindControl("TextCustomValue");
buttonFromGV.Visible = false;
}


What i'm doing wrong?

Thanks a lot!

[HairyMonkeyMan]

You cannot access the button control rendered by the ButtonField in this way. There are 2 ways you can do this. Both involve using a TemplateField;

Declaratively bind the visible property of the button to a field in your datasource like this:

<asp:GridView runat="server" ID="DemoGrid" AutoGenerateColumns="false">
    <Columns>
        <asp:TemplateField>
            <ItemTemplate>
                <asp:Button id="buttonFromGV" runat="server" Text="ButtonText" CommandName="AddCustomValue" Visible='<%# (bool)Eval("ShowButton")) %>' />
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>

Procedurally adjust the property like you were trying to do. Use the RowDataBound event of the grid:

protected void DemoGrid_RowDataBound(Object sender, GridViewRowEventArgs e)
{
    if(e.Row.RowType == DataControlRowType.DataRow)
    {
        if (condition) 
        {
            Button buttonFromGV = (Button)e.Row.FindControl("buttonFromGV");
            buttonFromGV.Visible = false;
        }
    }   
}