What is the difference between DataReader and DataSet in ADO.NET?

0 Answers   Petranics Solutions,

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Explain the advantages and disadvantages of using datalist?

0 Answers  

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What is datatable in ado.net?

0 Answers  

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What is datasource in ado.net?

0 Answers  

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Where is adodb dll located?

0 Answers  

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On ODP.net ?

1 Answers   MMTS,

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What is DataReader Object?

0 Answers  

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How to add an aggregate column?

0 Answers  

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How to maintain the relation between two tables in ADO.NET?

0 Answers   Petranics 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 is meant by entity framework?

1 Answers  

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What is difference between datatable and dataset?

0 Answers  

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