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{
GridViewRow row = gvUnitList.Rows[e.RowIndex];
UnitModel unit = new UnitModel();
unit.UnitID = Convert.ToInt32(row.Cells[0].Text);
unit.UnitName = ((TextBox)row.Cells[1].Controls[0]).Text;
//unit.UnitUserid = Convert.ToInt32(((TextBox)row.Cells[2].Controls[0]).Text);
if (((TextBox)row.Cells[2].Controls[0]).Text != "")
unit.UnitUserid = Convert.ToInt32(((TextBox)row.Cells[2].Controls[0]).Text);
UnitBLL.UpdateUnit(unit);
gvUnitList.EditIndex = -1;
BindUnitList();
}
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    type:"POST",
    url:"ajax/userexist.aspx",
    data:"username="+vusername.value,
    success:function(msg){
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What is AJAX
This section is for those who have no idea what AJAX is. If you don’t fall into this category, feel free to skip to the next section.
AJAX stands for asynchronous JavaScript and XML. If you see another term XHR, which is shorthand for XML HTTP request, it’s the same thing. ......

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