What does executenonquery () method return?

0 Answers  

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How to insert multiple records in asp .net from Gridview to Sql Database with out using loop condition ?

2 Answers  

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Explain the advantages and disadvantages of using datalist?

0 Answers  

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How can we perform transactions in .net?

0 Answers  

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What are the ado.net objects?

0 Answers  

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What is the difference between a datareader and a dataset?

0 Answers  

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How many major types of connection objects in ADO.NET?

0 Answers   MCN Solutions,

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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 types of Dataset ?

6 Answers   HCL,

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Explain the ADO . Net Architecture ( .Net Data Provider) ?

2 Answers  

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What are the different methods available under the sqlcommand class to access the data?

0 Answers  

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describe about the ado.net object model

4 Answers   TCS,

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