Answer / guest

ds1.Merge(ds2,true)

Answer / krishna

ds1.Merge(ds2,true)

ds1.Merge(ds3,true)

Answer / raj

HERE ans is No...coz third dataset is not present there....
also "ds1.Merge(ds2,true)" is not sufficient . How to show
this data into datagridview in VB.Net.?

When multiple users attempt to modify data at the same time Ex user 1 is updating record at same time user2 deleted record sucessfully.now user1 has press update button . how to handle concurrency

4 Answers   Digital Group,

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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();

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what is execute scalar?

11 Answers   Atharva Infotech, Dohatec New Media, Make eIT, Protech,

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