What is serialization and de-serialization in .net? How can we serialize the dataset object?

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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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How to check if a datareader is closed or opened? IsClosed()

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What is the difference between sqldatareader and sqldataadapter?

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What is DataReader Object?

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Describe the disconnected architecture of ADO.NET’s data access model.

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What provider ADO.net use by default ?

5 Answers   Accenture, BirlaSoft, Wipro,

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What is difference in record set and dataset?

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What is the use of command objects?

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Explain the different row versions available in table?

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Data reader read and forward only, how is it possible to get 2 tables of data at a time?

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What is Data view?

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