how to disable particular text-box using databound in form-view control

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hi to all,
Here i want to disable particular textbox in formview control,here i done onchangemode and some method but i occur error message like objext reference not set an instance of an object.

Here i want databound method for disable particular textbox:
textbox id =txt1;

in formview :::ondatabound="frmview_Databound"
Kindly give solution for this task.

Posted 8-Jan-15 0:55am

JOTHI KUMAR Member 10918227

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Mukesh.Ce62 · Answer 1 · 2015-01-16T19:19:00

1. Add formview in your aspx page like below.

XML

<asp:FormView ID="FormView1" runat="server" OnDataBound="FormView1_DataBound">
      <ItemTemplate>
          <table>
              <tr>
                  <td>
                      <asp:TextBox ID="txt1" Text='<%# Eval("Name") %>' runat="server"></asp:TextBox>
                  </td>
              </tr>
          </table>
      </ItemTemplate>
  </asp:FormView>

2. Fire databound event in aspx.cs fiel for formview

C#

protected void FormView1_DataBound(object sender, EventArgs e)
       {

           TextBox txt1 = (TextBox)FormView1.FindControl("txt1") as TextBox;
           txt1.Visible = false;

       }

3. bind fromview like

DataTable dt = new DataTable();

           dt.Columns.Add("Name", typeof(string));

           DataRow dtrow = dt.NewRow();    // Create New Row
           dtrow["Name"] = "Mukesh";            //Bind Data to Columns
           dt.Rows.Add(dtrow);

           FormView1.DataSource = dt;
           FormView1.DataBind();