What are the 4 types of classes in ADO.NET?

5 Answers  

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What is sql command in ado net?

0 Answers  

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How will you differentiate between ADO (ActiveX Data Object) and RDO (Remote Data Objects)?

0 Answers   CGI,

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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 we bind one datareader wid two dropdown list?

5 Answers  

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what is typed and untyped dataset

3 Answers  

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What is ole word?

0 Answers  

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What DataReader class do in ADO.NET ?

0 Answers   NA,

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What do you know about ADO.NET's objects and methods?

0 Answers   NA,

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How to read data with the sqldatareader ?

0 Answers  

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What is data view and variable view?

0 Answers  

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What is connected architecture in ado.net?

0 Answers  

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