How To Update A Column In A DataGrid Using C#.NET?
I am getting InvalidCastException as (Specified cast is not
valid) while updating 2nd column in a datagrid?
Id,firstname,lastname are the three columns of my datagrid
respectively. I wanted to edit the second column(lastname)
and update it. I did the following code in DataGrid's
updatecommand(),but failed to update !
Int varid=(int)DataGrid1.DataKeys[e.Item.ItemIndex];
TextBox lnm=(TextBox)e.Item.Cells[2].Controls[0]; string
str=lnm.Text ; SqlCommand cmd=new SqlCommand("update
customer set lastname='" + str + "' where id=" + varid
+ "",con); cmd.ExecuteNonQuery(); DataGrid1.EditItemIndex=-
1; DataGrid1.DataBind();
- 2 Answers
- 15538 Views
- Mind Tree, TCS, I also Faced
- E-Mail Answers
Answer Posted / aravazhi
Try this query you can avoid InvalidCastException...
string strQry = "update customer set lastname=@LastName
where id=@VarId";
SqlCommand cmd=new SqlCommand(strQry,con);
int varid = (int)DataGrid1.DataKeys[(int)e.Item.ItemIndex];
string LName = ((TextBox)e.Item.FondControl
("txtLName")).Text;//txtLname is ID of control
cmd.Paramters.Add(new SqlParameter("@LastName",LName));
cmd.Paramters.Add(new SqlParameter("@VarId",varid));
cmd.ExecuteNonQuery();
DataGrid1.EditItemIndex=- 1;
DataGrid1.DataBind();
| Is This Answer Correct ? | 15 Yes | 4 No |
Post New Answer View All Answers
Explain the difference between an ado.net dataset and an ado recordset?
What is execute scalar in ado.net?
What is ado.net components?
What providers does Ado.net uses?
Explain the difference between data reader and data adapter?
How to generate a single aggregate?
differance between ADO vs ADO.Net?
How to find the given query is optimised one or not?
How can we add/remove row's in "datatable" object of "dataset"?
What is ado asp?
What is bubbled event?
What are the main differences between classic ado and ado.net?
What is a column variable?
how we can fire event in databound coulm in datagfrid withot using button?
What are the disadvantages of using datalist?
