Using Thread read data of the gridView1 ?

Question

I'm writing code read data of gridView1 has got using Thread but get an error:

[CODE]

// old-style writing

if (string.IsNullOrEmpty(gridView1.GetRowCellValue(i, "Ghichu").ToString()))

//new style writing

if (string.IsNullOrEmpty(GetGridCellValue(i, "Ghichu").ToString()))

//Declare complement the new style writing

public delegate void GridGetEventArg(int rowHandle, string fieldname);

private string GetGridCellValue(int row, string fieldname)

{

if (gridControl1.InvokeRequired)

{

GridGetEventArg get = new GridGetEventArg(GetGridCellValue); //Error 1 'string Vidu.frmTinh.GetGridCellValue(int, string)' has the wrong return type

return gridControl1.Invoke(get, new object[] { row, fieldname });//Error 2 Cannot implicitly convert type 'object' to 'string'. An explicit conversion exists (are you missing a cast?)

}

else

{

return (gridControl1.MainView as GridView).GetRowCellValue(row, fieldname);//Error 3 Cannot implicitly convert type 'object' to 'string'. An explicit conversion exists (are you missing a cast?)

}

}

[/CODE]

the help you fix ?