Problem to set values in gridview control

Question

Hello All,

 

I am facing a wieard problem. I am trying to insert random values in a label inside gridview.

When I use breakpoint and debug program, It works fine and shows different-2 values in all rows. But without debugging, it shows same values in all rows.

Design:

<asp:GridView ID="GridView1" runat="server">
<AlternatingRowStyle Wrap="False" />
<Columns>
<asp:TemplateField HeaderText="StockNo">
<ItemTemplate>
<asp:Label ID="Label4" runat="server" Text="Label"></asp:Label>
</ItemTemplate>
</asp:TemplateField>
</Columns>
<EditRowStyle Wrap="False" />
<EmptyDataRowStyle Wrap="False" />
<FooterStyle Wrap="False" />
<HeaderStyle Wrap="False" />
<PagerStyle Wrap="False" />
<RowStyle Wrap="False" />
<SelectedRowStyle Wrap="False" />
<SortedAscendingCellStyle Wrap="False" />
<SortedAscendingHeaderStyle Wrap="False" />
<SortedDescendingCellStyle Wrap="False" />
<SortedDescendingHeaderStyle Wrap="False" />
</asp:GridView>

Code:

protected void Button6_Click(object sender, System.EventArgs e)
{
// foreach (GridViewRow row in GridView1.Rows)
for (int i = 0; i < GridView1.Rows.Count; i++ )
{
// Label lblSerial = (Label)GridView1.FindControl("Label4");
Label txtTotal = GridView1.Rows[i].Cells[0].FindControl("Label4") as Label;
Random random = new Random();
string r = "";
string N = "8988";
string K = "";
int j;
for (j = 1; j < 10; j++)
{
r += random.Next(0, 10).ToString();
}
K = N + r;
txtTotal.Text = K.ToString();
}
}

Please help.