how to change TemplateField back color based on condition in ASP.Net

Hi nedash,

Refer the below sample.

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false" OnRowDataBound="OnRowDataBound">
    <Columns>
        <asp:BoundField DataField="Id" HeaderText="Id" />
        <asp:BoundField DataField="Name" HeaderText="Name" />
        <asp:TemplateField ItemStyle-Width="110px" ItemStyle-HorizontalAlign="Center" ItemStyle-VerticalAlign="Middle"
            ItemStyle-Height="48px">
            <ItemTemplate>
                <div id="Div" runat="server" class="ersal1">
                    <asp:HyperLink ID="HyperLink1" runat="server" CssClass="LBsefSe">ارسال شده</asp:HyperLink>
                </div>
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>

Code

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        DataTable dt = new DataTable();
        dt.Columns.AddRange(new DataColumn[2] { new DataColumn("Id"), new DataColumn("Name") });
        dt.Rows.Add(1, "Red");
        dt.Rows.Add(2, "White");
        dt.Rows.Add(3, "Green");
        GridView1.DataSource = dt;
        GridView1.DataBind();
    }
}

protected void OnRowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        string color = e.Row.Cells[1].Text;
        e.Row.Cells[2].BackColor = Color.FromName(color);
    }
}

Screenshot