Highlight ASP.Net GridView Row on TemplateField Button Click using C# and VB.Net

Hi dorsa,

Check this example. Now please take its reference and correct your code.

HTML

<asp:GridView ID="GridView2" runat="server" AutoGenerateColumns="False" BackColor="White"
    BorderColor="#CCCCCC" BorderStyle="None" BorderWidth="1px" CellPadding="3" Width="49%"
    DataKeyNames="Id" CssClass="Hedear-center" HorizontalAlign="Center" Font-Names="Tahoma"
    Font-Size="Smaller" Style="margin-right: 0px" DataSourceID="EditCourseDB" OnSelectedIndexChanged="GridView2_SelectedIndexChanged">
    <Columns>
        <asp:BoundField DataField="Id" HeaderText="Id" SortExpression="Id" HeaderStyle-CssClass="Hedear-center"
            ReadOnly="True" Visible="false"></asp:BoundField>
        <asp:BoundField DataField="Title" HeaderText="Title" SortExpression="Title" HeaderStyle-CssClass="Hedear-center">
        </asp:BoundField>
        <asp:BoundField DataField="Floor" HeaderText="Floor" SortExpression="Floor" HeaderStyle-CssClass="Hedear-center">
        </asp:BoundField>
        <asp:BoundField DataField="Capacity" HeaderText="Capacity" SortExpression="Capacity"
            HeaderStyle-CssClass="Hedear-center"></asp:BoundField>
        <asp:BoundField DataField="TypeId" HeaderText="TypeId" SortExpression="TypeId" HeaderStyle-CssClass="Hedear-center">
        </asp:BoundField>
        <asp:TemplateField>
            <ItemTemplate>
                <asp:Button ID="Button1" Text="Get Value" runat="server" OnClick="GridView_Button_Click" />
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
    <EmptyDataTemplate>
        <span class="auto-style14"><strong>هیچ واحد درسی تعریف نشده است</strong></span>
    </EmptyDataTemplate>
    <FooterStyle BackColor="White" ForeColor="#000066" />
    <HeaderStyle BackColor="#006699" Font-Bold="True" ForeColor="White" />
    <PagerStyle BackColor="White" ForeColor="#000066" HorizontalAlign="Left" />
    <RowStyle ForeColor="#000066" />
    <SelectedRowStyle BackColor="#669999" Font-Bold="True" ForeColor="White" />
    <SortedAscendingCellStyle BackColor="#F1F1F1" />
    <SortedAscendingHeaderStyle BackColor="#007DBB" />
    <SortedDescendingCellStyle BackColor="#CAC9C9" />
    <SortedDescendingHeaderStyle BackColor="#00547E" />
</asp:GridView>
<asp:SqlDataSource ID="EditCourseDB" runat="server" ConnectionString="<%$ ConnectionStrings:KDUIS-v1ConnectionString %>"
    SelectCommand="SELECT * FROM [EDU_Room]"></asp:SqlDataSource><br />
Id :<asp:Label ID="lblId" runat="server" /><br />
Title :<asp:Label ID="LblCode" runat="server" />

C#

protected void GridView_Button_Click(object sender, EventArgs e)
{
    GridViewRow row = (GridViewRow)(sender as Button).NamingContainer;
    lblId.Text = GridView2.DataKeys[row.RowIndex].Values[0].ToString();
    LblCode.Text = row.Cells[1].Text;
    foreach (GridViewRow row1 in GridView2.Rows)
    {
        if (row1.RowIndex == row.RowIndex)
        {
            row1.BackColor = System.Drawing.ColorTranslator.FromHtml("#A1DCF2");
        }
        else
        {
            row1.BackColor = System.Drawing.ColorTranslator.FromHtml("#FFFFFF");
        }
    }
}

VB.Net

Protected Sub GridView_Button_Click(ByVal sender As Object, ByVal e As EventArgs)
    Dim row As GridViewRow = CType((TryCast(sender, Button)).NamingContainer, GridViewRow)
    lblId.Text = GridView2.DataKeys(row.RowIndex).Values(0).ToString()
    LblCode.Text = row.Cells(1).Text
    For Each row1 As GridViewRow In GridView2.Rows
        If row1.RowIndex = row.RowIndex Then
            row1.BackColor = System.Drawing.ColorTranslator.FromHtml("#A1DCF2")
        Else
            row1.BackColor = System.Drawing.ColorTranslator.FromHtml("#FFFFFF")
        End If
    Next
End Sub

Screenshot