image uploading in asp.net using c#

<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
    <style type="text/css">
        .auto-style15 {
            width: 91px;

        }
        .auto-style16 {
            width: 91px;
            height: 23px;

        }
        .auto-style17 {
             height: 23px;

             border: 2px solid #a1a1a1;
             border-radius:5px;
             margin-top:50px;
             margin-left:300px;
             padding-left:0;
        }
        .auto-style18 {
            width: 235px;
        }
        .auto-style19 {
            width: 235px;

            height: 23px;
        }
        .auto-style20 {
            width: 91px;
            height: 26px;

        }
        .auto-style21 {
            width: 235px;

            height: 26px;
        }
        .auto-style22 {
            width: 91px;
            height: 37px;
        }
        .auto-style23 {
            width: 235px;
            height: 37px;
            margin-left: 40px;
        }
        .grid{
          margin-left:150px;
          margin-top:50px;
        }
    </style>
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">

    <table class="auto-style17">
        <tr>
            <td class="auto-style15" align="center">username</td>
            <td class="auto-style18" >
                <asp:TextBox ID="TextBox2" runat="server" Width="171px"></asp:TextBox>
            </td>
        </tr>
        <tr>
            <td class="auto-style20" align="center">password</td>
            <td class="auto-style21">
                <asp:TextBox ID="TextBox3" runat="server" Width="171px" TextMode="Password"></asp:TextBox>
            </td>
        </tr>
        <tr>
            <td class="auto-style16" align="center">confirm mail</td>
            <td class="auto-style19">
                <asp:TextBox ID="TextBox4" runat="server" Width="171px"></asp:TextBox>
            </td>
        </tr>
        <tr>
            <td class="auto-style15" align="center">upload image</td>
            <td class="auto-style18">
                <asp:FileUpload ID="FileUpload1" runat="server"/>
            </td>
        </tr>
        <tr>
            <td class="auto-style15">&nbsp;</td>
            <td class="auto-style18">&nbsp;</td>
        </tr>
        <tr>
            <td class="auto-style22"></td>
            <td class="auto-style23">
                <asp:Button ID="Button1" runat="server" Text="Submit"  Width="65px" OnClick="Button1_Click1" />
                <asp:Button ID="Button2" runat="server" style="margin-left: 14px" Text="Reset" />
            </td>
        </tr>
        <tr>
            <td class="auto-style22">&nbsp;</td>
            <td class="auto-style23">
                <asp:Label ID="Label9" runat="server" Text="Label"></asp:Label>
            </td>
        </tr>
    </table>


        <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="userid" DataSourceID="SqlDataSource1" Width="608px" CssClass="grid" AllowPaging="True" AllowSorting="True" BackColor="White" BorderColor="#CCCCCC" BorderStyle="None" BorderWidth="1px" CellPadding="3">
            <Columns>
                <asp:BoundField DataField="userid" HeaderText="userid" InsertVisible="False" ReadOnly="True" SortExpression="userid" />
                <asp:BoundField DataField="username" HeaderText="username" SortExpression="username" />
                <asp:BoundField DataField="password" HeaderText="password" SortExpression="password" />
                <asp:BoundField DataField="mail" HeaderText="mail" SortExpression="mail" />
                <asp:BoundField DataField="imagename" HeaderText="imagename" SortExpression="imagename" />
                <asp:ImageField DataImageUrlField="uploadimage" HeaderText="uploadimage">
                    <ControlStyle Width="70%" Height="70%"/>
                </asp:ImageField>
            </Columns>
            <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="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:prakashConnectionString %>" SelectCommand="SELECT * FROM [getezeeregister]"></asp:SqlDataSource>




</asp:Content>

public void GvBind()
        {
                
            SqlCommand cmd = new SqlCommand("select * from getezeeregister", con);
            con.Open();
            SqlDataReader dr = cmd.ExecuteReader();
            GridView1.DataSource = dr;
            
        }




    protected void Button1_Click1(object sender, EventArgs e)
    {
        

     if (FileUpload1.HasFile)
        {
            
            string pathName = "userimage/" + Path.GetFileName(FileUpload1.PostedFile.FileName);
        string filename = Path.GetFileName(FileUpload1.PostedFile.FileName);
         SqlCommand cmd = new SqlCommand("insert into getezeeregister(username,password,mail,imagename,uploadimage) values ('" + TextBox2.Text + "','" + TextBox3.Text + "','" + TextBox4.Text + "','" + filename + "','"+pathName+"')", con);
          con.Open();
          cmd.ExecuteNonQuery();
           con.Close();
           FileUpload1.SaveAs(Server.MapPath("~/userimage/"+FileUpload1.FileName));
          ScriptManager.RegisterStartupScript(this, this.GetType(), "popup", "alert('Registered successfully..!! ');", true);
         

                    
        }
        else
        {
 
            ScriptManager.RegisterStartupScript(this, this.GetType(), "popup", "alert('Please select a file to upload ');", true);
        }
    }