隐藏字段在asp.net中不起作用c＃ [英] hidden field is not working in asp.net c#

问题描述

隐藏字段在asp.net中不起作用c＃

hidden field is not working in asp.net c#

void counts()
    {

        foreach (RepeaterItem items in repeat.Items)
        {
            HiddenField comment_like = (HiddenField)items.FindControl("comment_id");
            Label user_counts = (Label)items.FindControl("user_counts");

            

            if (Request.QueryString["id"] != null)
            {
                int id;
                id = Convert.ToInt32(Request.QueryString["id"].ToString());
                con = new SqlConnection(str);
                con.Open();
                cmd = new SqlCommand("sp_command_count", con);
                cmd.CommandType = CommandType.StoredProcedure;
                cmd.Parameters.AddWithValue("@eid", id);
                cmd.Parameters.AddWithValue("@comment_id", comment_like.Value);
                da = new SqlDataAdapter(cmd);
                dt = new DataTable();
                da.Fill(dt);

                if (dt.Rows.Count > 0)
                {
                    DataRow dr = dt.Rows[0];
                    user_counts.Text = dr["total_count"].ToString() + "of" + dr["like_count"].ToString();

                    repeat.DataSource = dt;
                    repeat.DataBind();
                    review_panel.Visible = true;


                }
                else
                {
                    review_panel.Visible = false;
                }
                con.Close();
            }
        }
    }

asp.code

asp.code

<asp:Label ID="user_counts" runat="server" CssClass="counts">

                                     <asp:HiddenField ID="comment_like" runat="server" Value='<%#Eval("comment_id") %>' />

存储过程

stored procedure

ALTER PROCEDURE [dbo].[sp_command_count]

   (
    @eid int,
    @comment_id int
   )
AS
BEGIN
Declare  @sql int
    SET NOCOUNT ON;
      select @sql ='select *,(select c.comment_like from comments c where id=@eid and c.comment_id='+convert(varchar,@comment_id)+') as like_count,
          (select sum(comment_like+comment_dislike) from comments c where id=@eid and c.comment_id='+convert(varchar,@comment_id)+') as total_count from comments c
          where c.id=@eid and c.comment_id='+convert(varchar,@comment_id)+''
      END

推荐答案

问题在这里

Problem is here

foreach (RepeaterItem items in repeat.Items)
        {
            HiddenField comment_like = (HiddenField)items.FindControl("comment_id");

您的隐藏字段id是 comment_like ，但您正在尝试找到ID comment_id 的隐藏字段，而不是那里。

将此更改为

Your hidden field id is comment_like but you are trying to find hidden field with id comment_id which not there.
Change this to

foreach (RepeaterItem items in repeat.Items)
        {
            HiddenField comment_like = (HiddenField)items.FindControl("comment_like");

希望，这有助于：）

Hope, this helps :)

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