What are the two fundamental objects in ADO.NET?

6 Answers  

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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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Which is faster ado.net or linq?

0 Answers  

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How to find the given query is optimised one or not?

0 Answers  

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Explain the two fundamental objects in ado.net?

0 Answers  

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what is a dataset?

9 Answers   Choice Solutions,

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Which ado.net object is very fast in getting data from the database?

0 Answers  

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What is partial class?

0 Answers  

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What is the use of data grid?

0 Answers  

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Define data adapter?

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 the default provider in ado.net?

0 Answers  

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