CODEWITHSUNDEEP
c#asp.netlistview
vinay teja reddy
vinay teja reddy

Reputation: 259

How to hide or manipulate a control inside a ListView

I have a textbox control and a button control inside a listview, I want to hide those controls when required from code behind, I have tried using something like this 

ListViewName.FindControl("TextBoxComment").Visible = false;

and 

((TextBox)ListViewName.FindControl("TextBoxComment")).Visible = false

but when I run the code it gives NullReference Exception
Please help.

 <ItemTemplate>
          <table>

               <tr>
                   <td>
                       <asp:TextBox ID="TextBoxComment" runat="server" >
                       </asp:TextBox>
                   </td>

                   <td>
                       <asp:Button ID="ButtonSubmit" runat="server"  
                            CommandName="Comment" 
                            CommandArgument='<%# Eval("FlowPostID") %>'/>
                   </td>
                </tr>
          </table>
    </ItemTemplate>

Upvotes: 1

Views: 1748

Answers (3)

vinay teja reddy
vinay teja reddy

Reputation: 259

I did this, it worked 

TextBox Box = new TextBox()

Button Butt = new Button();

Box = (TextBox)e.Item.FindControl("TextBoxComment")
Butt = (Button)e.Item.FindControl("ButtonSubmit")

Box.Visible = false;

That worked perfectly fine :) Thank you all for your effort :)

Upvotes: 0

Derek
Derek

Reputation: 8628

You need to do this on the ListView's ItemDataBound Event Handle.

var item = (ListViewItem)e.DataItem;

var txtBox = (txtBox)item.FindControl("TextBoxComment");

if(txtBox != null)
{
  txtBox.Visible = false;
}

And so forth...

Upvotes: 1

शेखर
शेखर

Reputation: 17614

You need to check for the null values

var textbox=ListViewName.FindControl("TextBoxComment");
if(textbox!=null)
    ListViewName.FindControl("TextBoxComment").Visible = false;

Upvotes: 0

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