What is ado.net object model?

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differences between ADO and ADO.NET

0 Answers   Microsoft,

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Define isolation?

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What are the differences between OLEDB and SQLClient Providers?

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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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Can a DataReader be used as a DataSource for a GridView. If it is so how will you handle paging.

3 Answers   Directi,

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How can we add/remove row's in "datatable" object of "dataset"?

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Explain executenonquery?

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How to connect and retrieve data from database using dataset

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What are ado.net objects?

0 Answers  

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What does ado stand for in ado.net?

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How to insert multiple records in asp .net from Gridview to Sql Database with out using loop condition ?

2 Answers  

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