Name is neither a datacolumn nor a datarelation for table .

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I am not able to get previous value in dropdownlist when i click on edit button in gridview.

What I have tried:

if (e.Row.RowType == DataControlRowType.DataRow && gvcallRegister.EditIndex == e.Row.RowIndex)
      {

           if ((e.Row.RowState & DataControlRowState.Edit) > 0)
           {
          using (SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString))
          {
              DropDownList ddlprod = (DropDownList)e.Row.FindControl("DropDownList1");
              con.Open();

              SqlCommand cmd = new SqlCommand("select name from registeruser where dept='Sales'", con);
              SqlDataAdapter da = new SqlDataAdapter(cmd);
              DataSet ds = new DataSet();
              da.Fill(ds);
              ddlprod.DataSource = ds;
              ddlprod.DataTextField = "name";
              ddlprod.DataValueField = "name";
              ddlprod.DataBind();

              DataRowView dr = e.Row.DataItem as DataRowView;
              ddlprod.SelectedValue = dr["name"].ToString();// default selected value

                  }
              }

          }
      }

Posted 18-May-18 18:48pm

ADI@345

Updated 18-May-18 19:51pm

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OriginalGriff · Answer 1 · 2018-05-18T19:52:00

Look at the error message:

Quote:
Name is neither a datacolumn nor a datarelation for table

Then look at your code:

C#

              SqlCommand cmd = new SqlCommand("select name from registeruser where dept='Sales'", con);
...
              ddlprod.DataTextField = "name";
              ddlprod.DataValueField = "name";
...
              ddlprod.SelectedValue = dr["name"].ToString();

Now check your DB: does it have a column called "name" in the table "registeruser"? If it does, use the debugger to check the DataRowView and see exactly what cells it contains. Is "name" there?

The error message says one of them doesn't.