1
我試圖從一個multiquery sql顯示數據到我的aspx頁面，但沒有讓事情變得容易。從sql查詢的多個值顯示在aspx頁面
我有一個母版頁，我想從sql顯示值。
我的母版（的Site.Master）：
<%@ Master Language="C#" AutoEventWireup="true" CodeBehind="Site.master.cs" Inherits="MySite.SiteMaster" %>
<!DOCTYPE html>
<html lang="en">
<head runat="server"></head>
<body>
<form runat="server">
<div class="content">
<div>
<font class="label label-primary"><%= DateTime.Now.ToShortDateString() %>
<asp:Label runat="server" ID="LabelCountMember"></asp:Label>
<asp:Label runat="server" ID="LabelCountLogins"></asp:Label>
<asp:Label runat="server" ID="LabelCountFailedLogins"></asp:Label>
</div>
<asp:ContentPlaceHolder ID="MainContent" runat="server">
</asp:ContentPlaceHolder>
<hr />
<footer>
<p>This is my footer!</p>
</footer>
</div>
</form>
</body>
</html>
我的隱藏文件的代碼（Site.Master.cs）：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
using System.Web.Configuration;
using System.Data;
namespace MySite
{
public partial class SiteMaster : MasterPage
{
protected void Page_Load(object sender, EventArgs e)
{
}
public void countmembers(object sender, EventArgs e)
{
string sql = @"SELECT (SELECT COUNT(MemberID) from MyTable where Mamber = 'Registered') AS AllRegMembers,
(SELECT COUNT(MemberID) from MyTable where LoginStatus = 'ok') AS AllLogins,
(SELECT COUNT(MemberID) from MyTable where LoginStatus = 'fail') AS AllFailLogins";
string variable;
using (var connection = new SqlConnection(WebConfigurationManager.ConnectionStrings["ConnString"].ConnectionString))
using (var command = new SqlCommand(sql, connection))
{
connection.Open();
using (var reader = command.ExecuteReader())
{
//Check the reader has data:
if (reader.Read())
{
variable = reader.GetInt32(reader.GetOrdinal("AllRegMembers")).ToString();
}
// If you need to use all rows returned use a loop:
while (reader.Read())
{
// Do something
string strAllRegMembers = reader.GetInt32(reader.GetOrdinal("AllRegMembers")).ToString();
string strAllLogins = reader.GetInt32(reader.GetOrdinal("AllLogins")).ToString();
string strAllFailLogins = reader.GetInt32(reader.GetOrdinal("AllFailLogins")).ToString();
Label.LabelCountMember.Text = strAllRegMembers;
Label.LabelCountLogins.Text = strAllLogins;
Label.LabelCountFailedLogins.Text = strAllFailLogins;
}
}
}
}
}
}
請幫我理清基本structur。我已經嘗試了很多不同的方法，但沒有一個能夠正常工作，而且在處理來自閱讀器的多個值時，我真的找不到一個簡單的示例。我很不情願地用錯誤的關鍵字搜索。
我可以通過使用下面的代碼讓它在Classic ASP中工作，但我真的想開始移動到C＃。下面
<%@LANGUAGE="VBSCRIPT" CODEPAGE="65001"%>
<!--#include file="dbcon.asp" -->
<%
sql = "SELECT (SELECT COUNT(MemberID) from MyTable where Mamber = 'Registered') AS AllRegMembers, " & _
"SELECT COUNT(MemberID) from MyTable where LoginStatus = 'ok') AS AllLogins, " & _
"(SELECT COUNT(MemberID) from MyTable where LoginStatus = 'fail') AS AllFailLogins";"
call dbOpen(conn)
Set rs = conn.Execute(sql)
strAllRegMembers = rs("AllRegMembers")
strAllLogins = rs("AllLogins")
strAllFailLogins = rs("AllFailLogins")
rs.Close : Set rs = Nothing
Call dbClose(conn)
%>
<!DOCTYPE HTML>
<html>
<head></head>
<body>
<span>Registered members: <%= strAllRegMembers %></span>
<span>Number of OK logins: <%= strAllLogins %></span>
<span>Number of failed logins: <%= strAllFailLogins %></span>
</body>
</html>
感謝Chris和Jo Biesta folows工作代碼隱藏文件。 Perfekt傢伙，謝謝！
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
using System.Web.Configuration;
using System.Data;
namespace MySite
{
public partial class SiteMaster : MasterPage
{
protected void Page_Load(object sender, EventArgs e)
{
countmembers();
}
public void countmembers()
{
string strAllRegMembers = String.Empty;
string strAllLogins = String.Empty;
string strAllFailLogins = String.Empty;
string sql = @"SELECT (SELECT COUNT(MemberID) from MyTable where Mamber = 'Registered') AS AllRegMembers,
(SELECT COUNT(MemberID) from MyTable where LoginStatus = 'ok') AS AllLogins,
(SELECT COUNT(MemberID) from MyTable where LoginStatus = 'fail') AS AllFailLogins";
string variable;
using (var connection = new SqlConnection(WebConfigurationManager.ConnectionStrings["ConnString"].ConnectionString))
using (var command = new SqlCommand(sql, connection))
{
connection.Open();
using (var reader = command.ExecuteReader())
{
//Check the reader has data:
if (reader.Read())
{
variable = reader.GetInt32(reader.GetOrdinal("AllRegMembers")).ToString();
}
// If you need to use all rows returned use a loop:
while (reader.Read())
{
// Do something
strAllRegMembers = reader.GetInt32(reader.GetOrdinal("AllRegMembers")).ToString();
strAllLogins = reader.GetInt32(reader.GetOrdinal("AllLogins")).ToString();
strAllFailLogins = reader.GetInt32(reader.GetOrdinal("AllFailLogins")).ToString();
}
}
}
LabelCountMember.Text = strAllRegMembers;
LabelCountLogins.Text = strAllLogins;
LabelCountFailedLogins.Text = strAllFailLogins;
}
}
}
對於其他人可能會覺得這有用。如果返回值是文本格式，用這個代替：
reader.GetString(reader.GetOrdinal("AllRegMembers"));
現在我試着插入斷點，在不同的方式嘗試調用從頁面加載的方法，但沒了。關注我定義了多少個斷點（我曾嘗試使用「何時點擊」顯示消息和「點擊數」，但是沒有）。我如何讓它運行？我嘗試在Page_load中添加countmembers（）也嘗試在我的aspx文件中添加countmembers（），但是沒有。 – Slint
@Slint檢查Chris在代碼上左側的答案以嘗試，我會建議他發送相同的代碼。 –
是的，Chris的例子工作。只需要解決我的Label.LabelCountMemebers.Text到LabelCountMembers.Text我的第一次misstakes 謝謝你們！ – Slint