What is the namespaces being used to access oracle database?

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What does datareader object do?

0 Answers  

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How to Read, Add, Update and Delete record in Entity Framework ?

0 Answers  

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Explain the difference between data reader and data adapter?

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What is the difference between a Dataset and DataReader? Can dataReader hold data from multiple tables?

3 Answers   Fulcrum Logic, Merrill Lynch,

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What are the advantages using ado.net?

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What are the classes in System.Data.Common Namespace?

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Is it possible to load multiple tables in a Dataset?

0 Answers  

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Which method do you invoke on the DataAdapter control to load your generated dataset with data?

5 Answers   IBM, Veegyapan Impacts,

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How can you identify whether or not any changes are made to the DataSet object since it was last loaded?

0 Answers  

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What is ado.net objects?

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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