What are the usages of the command object in ado.net?
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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();
About ADO and its objects ?
How to check if the Dataset has records ?
Some important instruction regarding ADO.NET connection string ?
What providers do you use to connect to oracle database ?
What is disconnected scenario in entity framework?
What are relation objects in dataset and how & where to use them?
What is ole2 format?
Explain all the classes those are used for database connections between sql server and asp.net?
What is the difference between Datareader and Dataset?
Does dapper use ado.net?
How do you update a dataset in ado.net?