What you mean by filtering of data?

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What is difference between executenonquery and executequery?

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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();

2 Answers   Mind Tree, TCS,

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Which method is used by command class to execute SQL statements that return single value?

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We all know that Dataset is purely disconnected architechure, but we also know that we can update the changes made to the dataset can be updated in the backend database. when there is no connection how does the update happedn?

6 Answers   Accenture, FastStream,

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How to get oledb connection?

3 Answers  

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Can we create Synonymns in MS Acess,My Sql Server,Sql Server? But iam we can create in oracle!

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What is executescalar and executenonquery?

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Define isolation?

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Explain the difference in record set and dataset?

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What is a dynaset in access?

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What is ado and rdo?

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