[Solved] TextBox value is empty after partial PostBack in ASP.Net

Sir

fruit Value is not showing in TextBox after click on partial postback.

<asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
    <ContentTemplate>
        <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false">
            <Columns>
                <asp:BoundField DataField="FruitName" HeaderText="Fruit Name" />
                <asp:TemplateField>
                    <ItemTemplate>
                        <asp:LinkButton ID="lnkPartial" runat="server" Text="Partial PostBack" OnClick="PartialPostBack" />
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField>
                    <ItemTemplate>
                        <asp:LinkButton ID="lnkFull" runat="server" Text="Full PostBack" OnClick="FullPostBack" />
                    </ItemTemplate>
                </asp:TemplateField>
            </Columns>
        </asp:GridView>
    </ContentTemplate>
</asp:UpdatePanel>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>

protected void PartialPostBack(object sender, EventArgs e)
{
    string fruitName = ((sender as LinkButton).NamingContainer as GridViewRow).Cells[0].Text;
    TextBox1.Text = fruitName;
    //string message = "alert('Partial PostBack: You clicked " + fruitName + "');";
    //ScriptManager.RegisterClientScriptBlock(sender as Control, this.GetType(), "alert", message, true);
}

protected void FullPostBack(object sender, EventArgs e)
{
    string fruitName = ((sender as LinkButton).NamingContainer as GridViewRow).Cells[0].Text;
    string message = "alert('Full PostBack: You clicked " + fruitName + "');";
    ClientScript.RegisterClientScriptBlock(this.GetType(), "alert", message, true);
}