What?s the role of the DataReader class in ADO.NET connections?

7 Answers   Honeywell, Ksb,

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What is the difference between dataset and datatable?

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What are all the different authentication techniques used to connect to MS SQL Server?

0 Answers  

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What are the ADO.NET Controls?

6 Answers  

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

0 Answers  

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What are the ado.net components?

0 Answers  

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Which is better ole db or odbc?

0 Answers  

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List the 4 common ado.net namespaces?

0 Answers  

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What are the namespaces used in ado.net for data access?

0 Answers  

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How to add a check box or a dropdown list to a column in a datagrid?

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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What are the different methods by which we can populate a dataset?

0 Answers  

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