What are the usages of the command object in ado.net?

0 Answers  

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Explain how to create dynamic gridview?

0 Answers  

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what is a dataview?why is it used for?

4 Answers   Choice Solutions,

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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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What is meant by executenonquery?

0 Answers  

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How do we invoke queries from the application

2 Answers  

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ADO.NET is Disconnected Architecture. DataReader is connected Architecture, but DataReader is a part of ADO.NET. How is it possible?

3 Answers   Zensar,

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Which is faster datareader or dataadapter?

0 Answers  

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What is ado and rdo?

0 Answers  

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What is a sqldataadapter?

0 Answers  

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describe about the ado.net object model

4 Answers   TCS,

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what is meant by connection pooling and event pumbling in ado.net

3 Answers   TCS,

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