About ado.net components/objects. Usage of data adapters and tell the steps to retrieve data ?

1 Answers   MMTS,

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What is oledb driver?

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what is the difference betwen typed dataset and untyped dataset?in general which dataset can we use in programming?

0 Answers   EDS,

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How can I retrieve two tables of data at a time by using data reader?

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What is data control techniques?

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What are the different layers of ado.net?

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Why ca not we use multiple inheritance and garbage collector paralelly in .net?

0 Answers  

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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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Explain the architecture of ado.net?

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What is ado net stands for?

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What is a datareader object?

0 Answers  

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What is the difference between linq and ado.net?

0 Answers  

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