Answer / 1647264

The SqlDataAdapter has SelectCommand, InsertCommand, DeleteCommand and UpdateCommand

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 namespaces used in the project to connect the database? What data providers available in .net to connect to database?

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Execute nonquery returns no. of afected rows.So if my stored procedure hav lot of select stmnt, delete stmnt, insert stmnt..then what does execute nonquery returns in this case?

6 Answers   Wipro,

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Explain the architecture of ado.net?

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What is ado net stands for?

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How does entity framework work?

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What are all features of ADO.Net?

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what is different between SqlCommand object and Command Behaviour Object

3 Answers  

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Which is faster sqldataadapter and sqldatareader?

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What are the key features of ado.net?

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What is microsoft ado.net?

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Explain the role of data provider in ado.net?

0 Answers  

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