HTML
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script type="text/javascript">
function Calulate(txt) {
//alert(txt.value);
var tr = txt.parentNode.parentNode;
var textbox = tr.getElementsByTagName("input");
if (isNaN(textbox[0].value)) {
alert("Enter integer value");
}
else {
textbox[2].value = parseInt(textbox[0].value) - parseInt(textbox[1].value);
}
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false">
<Columns>
<asp:BoundField DataField="Id" HeaderText="Id" />
<asp:TemplateField HeaderText="TextBox1">
<ItemTemplate>
<asp:TextBox ID="txtAmount1" runat="server" />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="TextBox2">
<ItemTemplate>
<asp:TextBox ID="txtAmount2" runat="server" onchange="Calulate(this)" />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="TextBox3">
<ItemTemplate>
<asp:TextBox runat="server" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</div>
</form>
</body>
</html>
C#
protected void Page_Load(object sender, EventArgs e)
{
if (!this.IsPostBack)
{
DataTable dt = new DataTable();
dt.Columns.Add("Id",typeof(int));
dt.Rows.Add(1);
dt.Rows.Add(2);
dt.Rows.Add(3);
this.GridView1.DataSource = dt;
this.GridView1.DataBind();
}
}
Screenshot
