What are the benefits of using ado.net?

0 Answers  

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how to create a quiz software using 4 options to answer and how to check with answers in the database and award marks....

1 Answers   Ford,

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Explain the various objects in dataset.

0 Answers  

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What is meant by entity framework?

1 Answers  

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what is clustered index?why is it created?

4 Answers   Microsoft, Wipro,

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What are the ado.net objects?

0 Answers  

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How to add a javaScript function in a datagrid?

0 Answers   C DAC, CDAC,

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Which is faster dataset or datareader?

0 Answers  

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Explain the basic use of "dataview" and explain its methods.

0 Answers  

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How to store data in memory?

0 Answers  

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How would u connect to database using .NET?

5 Answers   TCS, Tesco,

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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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