数据未插入数据库，它在表中显示空列

Question

我在面板中有表单，我使用表单中的存储过程将数据插入数据库。它不会抛出任何错误，但它不会在数据库中显示数据。代码成功运行，但表中的列为空。

这是我的存储过程：

CREATE procedure [dbo].[spDREG]
    (@pname varchar(250),
     @spname varchar(250),
     @age int,
     @spage int,
     @cat varchar(50),
     @mno bigint,
     @emlid varchar(250),
     @years varchar(50)
    )
AS 
BEGIN
    DECLARE @dregid INT = @@identity

    INSERT INTO DREG(P_NAME, SECP_NAME, AGE, AGET, CAT, MOB_NO, EMAILD, YEARS)
    VALUES(@pname, @spname, @age, @spage, @cat, @mno, @emlid, @years)
END

这是我背后的代码

protected void Dsbtn_click(object sender, EventArgs e)
{
        string psname ="spDREG"; ;
        con.Open();

        SqlCommand cmd = new SqlCommand(psname,con);
        cmd.CommandType = CommandType.StoredProcedure;

        cmd.Parameters.AddWithValue("@pname", TextBox1.Text.ToString());
        cmd.Parameters.AddWithValue("@spname", TextBox2.Text.ToString());
        cmd.Parameters.AddWithValue("@age", TextBox22.Text.ToString());
        cmd.Parameters.AddWithValue("@spage", TextBox24.Text.ToString());
        cmd.Parameters.AddWithValue("@cat", DropDownList1.Text.ToString());
        cmd.Parameters.AddWithValue("@mno", TextBox4.Text.ToString());
        cmd.Parameters.AddWithValue("@emlid", TextBox5.Text.ToString());
        cmd.Parameters.AddWithValue("@years", DropDownList2.Text.ToString());

        cmd.ExecuteNonQuery();
        con.Close();

        dreglbl.Text = "You have successfully registered";
    }

这是我的设计部分

<asp:Panel runat="server" ID="dan" class="npan" Width="900px" Height="500px">
    <h3 style="text-align: center" class="panhed">Please Fill This Form TO Participate(Dance Registration)</h3>
    <div id="snam" runat="server" class="nam">
        <asp:Label ID="Label2" runat="server" Text="Name of participant:"></asp:Label>
        <asp:TextBox ID="TextBox1" CssClass="txtcls" runat="server" TextMode="MultiLine"></asp:TextBox>                                     
        <asp:Button ID="addm" class="addbtn" runat="server" autopostback="true" Text="Add member" OnClick="addm_Click" />
    </div>
    <div id="Div3" runat="server" class="nams">
        <asp:Label ID="Label3" runat="server" autopostback="true" Text="Name of 2nd participant:"></asp:Label>
        <asp:TextBox ID="TextBox2" CssClass="txtscls" runat="server"></asp:TextBox>
    </div>
    <div id="Div29" runat="server" class="nams">
        <asp:Label ID="Label27" runat="server" Text="Age:"></asp:Label>
        <asp:TextBox ID="TextBox22" CssClass="agtxt" placeholder="1st" runat="server"></asp:TextBox>
        <asp:TextBox ID="TextBox24" CssClass="agstxt" placeholder="2nd" AutoPostBack="true" runat="server"></asp:TextBox>
    </div>
    <div id="Div2" runat="server" class="cate">
        <asp:Label ID="Label4" runat="server" Text="Select Category:"></asp:Label>
        <asp:DropDownList runat="server" ID="DropDownList1" Class="drpd" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged">
            <asp:ListItem Value="22">select</asp:ListItem>
            <asp:ListItem Value="Ss">Solo</asp:ListItem>
            <asp:ListItem Value="Dd">Duet</asp:ListItem>
            <asp:ListItem Value="Gg">Group</asp:ListItem>
        </asp:DropDownList>
    </div>
    <div id="divv" class="mobn" runat="server">
        <asp:Label ID="Label5" runat="server" Text="Mobile No:"></asp:Label>
        <asp:TextBox ID="TextBox4" CssClass="mobtxt" runat="server"></asp:TextBox>
    </div>
    <div id="Div6" runat="server" class="eml">
        <asp:Label ID="Label6" runat="server" Text="E-Mail:"></asp:Label>
        <asp:TextBox ID="TextBox5" CssClass="emtxt" runat="server"></asp:TextBox>
    </div>
    <div id="Div7" runat="server" class="yer">
        <asp:Label ID="Label7" runat="server" Text="Select Year:"></asp:Label>
        <asp:DropDownList runat="server" ID="DropDownList2" Class="drpds">
            <asp:ListItem>select</asp:ListItem>
            <asp:ListItem>First</asp:ListItem>
            <asp:ListItem>Second</asp:ListItem>
            <asp:ListItem>Third</asp:ListItem>
            <asp:ListItem>other</asp:ListItem>
        </asp:DropDownList>
    </div>
    <div id="Div8" runat="server" class="btndiv">
        <asp:Button ID="Dsbtn" runat="server" Class="Btncss" Text="Submit" OnClick="Dsbtn_click" />
        <asp:Label ID="dreglbl" runat="server" Text="label"></asp:Label>
    </div>
</asp:Panel>

请解决它们。谢谢