How to create data relations?

0 Answers  

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What is adodb dll?

0 Answers  

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

0 Answers  

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What is the difference between data reader and data adapter?

0 Answers  

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What are the different row versions available in table?

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 is ambient transaction?

0 Answers  

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Write steps of retrieving data using ado.net ?

3 Answers   Keane India Ltd,

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What are the several execute methods of ado.net?

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How to copy the contents from one table to another table and how to delete the source table in ado.net?

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explain connection less and with connection?diference between data reader,data set,data adapter? can we use data reader,data set in a single application? if yes explain with simple code,if no explain?

3 Answers   Techno Labs,

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What is data reader in ado.net?

0 Answers  

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