Interested to Buy Any Domain ? << Click Here >> for more details...
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
- 16032 Views
- Mind Tree, TCS, I also Faced
- E-Mail Answers
Answer Posted / pk
public void DataGrid1_Update(Object sender,
DataGridCommandEventArgs e)
{
string unitprice =
((TextBox)e.Item.Cells[3].Controls[0]).Text;
string quantity =
((TextBox)e.Item.Cells[4].Controls[0]).Text;
string discount =
((TextBox)e.Item.Cells[5].Controls[0]).Text;
int orderid =
(int)DataGrid1.DataKeys[(int)e.Item.ItemIndex];
string productid =
((TextBox)e.Item.Cells[2].Controls[0]).Text;
try
{
string updateCmd = "UPDATE [Order Details] SET
UnitPrice = @UnitPrice,"
+ "Quantity = @Quantity, Discount = @Discount
where OrderId =@OrderId and ProductId=@ProductId";
SqlConnection cn = new SqlConnection(strConn);
SqlCommand myCommand = new SqlCommand(updateCmd,
cn);
myCommand.Parameters.Add(new
SqlParameter("@UnitPrice", Convert.ToDecimal(unitprice)));
myCommand.Parameters.Add(new
SqlParameter("@Quantity", Convert.ToInt16(quantity)));
myCommand.Parameters.Add(new
SqlParameter("@Discount", Convert.ToInt16(discount)));
myCommand.Parameters.Add(new
SqlParameter("@OrderId", orderid));
myCommand.Parameters.Add(new
SqlParameter("@ProductId", Convert.ToInt16(productid)));
cn.Open();
myCommand.ExecuteNonQuery();
DataGrid1.EditItemIndex = -1;
BindGrid();
}
catch (Exception ex)
{
lblError.Visible = true;
lblError.Text = (ex.Message);
}
| Is This Answer Correct ? | 2 Yes | 5 No |
Post New Answer View All Answers
How can we load multiple tables in to dataset?
What is ado.net code?
What is ado code?
What is DataReader Object?
What are the essential features of ado.net?
What is oledb driver?
What is the difference between oledb sql server and oledbdotnet provider?
What is the meaning of executenonquery?
What are typed and untyped dataset?
What are the different layers of ado.net?
Explain how do you connect to sql server database without using sqlclient?
Why do we need ado.net?
What is serialization and de-serialization in .net?
What is the full form of ado.net?
What is the difference between sqlcommand and sqldataadapter?
