What is difference between datareader and dataadapter?

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What is the functionality of data provider in ado.net?

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What is ado.net tutorial?

0 Answers  

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Difference between DataReader and DataAdapter / DataSet and DataAdapter?

3 Answers   TCS,

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Which provider is used to connect ms access, oracle, etc…?

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What is shadow copy?

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Explain the difference in an abstract class and an interface?

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Explain all the classes those are used for database connections between sql server and asp.net?

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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 the difference between Datareader and Dataset?

0 Answers  

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How to sort the data in Datatable

2 Answers   NetProphet,

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Which parameter of ConnectionString is used to specify the name of the database?

0 Answers  

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