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我想讓用戶只能選擇他希望在gridview而不是表格的每一列上看到的數據。例如，我將每列顯示在一個複選框列表中。如果用戶只選擇名稱和地址並點擊提交，則在回發時，名稱和地址應顯示在gridview中。我有一切正常工作，除了gridview不顯示任何數據。Visual Studio 2012 - Gridview不在網絡表格上顯示
這裏是我的.aspx代碼：
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="AdminReport.aspx.cs" Inherits="WorkOrder.AdminReport" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<link href="Style.css" rel="stylesheet" type="text/css" />
<link href="msgBoxLight.css" rel="stylesheet" type="text/css" />
<script src="Scripts/jquery-1.8.0.min.js" type="text/javascript"></script>
<script src="Scripts/jquery.msgBox.js" type="text/javascript"></script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Panel ID="Panel1" runat="server" Width="1020px">
<asp:Image ID="Image1" runat="server" ImageUrl="~/Images/mast_left.png" />
</asp:Panel>
</div>
<div class="Section"> <hr /><h2>
Online Work Order Form - (Admin Report)</h2>
</div>
<br />
<asp:Label ID="Label2" runat="server" Text="Select data you want to view and click the submit button:" CssClass="label"></asp:Label>
<br />
<br />
<br />
<br />
<asp:CheckBoxList ID="cbSelectData" runat="server" AutoPostBack="False" AppendDataBoundItems="True" BorderStyle="Ridge" CellPadding="15" CellSpacing="2" RepeatColumns="6" BackColor="#FFD7AE">
</asp:CheckBoxList>
<br /><br />
<asp:Button ID="btnGetResults" runat="server" Text="Submit" OnClick="btnGetResults_Click"/>
<br />
<asp:Label ID="Message" runat="server" Text=""></asp:Label>
<br /> <br />
<asp:Label ID="Label1" runat="server" Text="Select to filter by position:"></asp:Label>
<br /> <br /> <br />
<asp:GridView ID="GridViewReport" runat="server" AutoGenerateColumns="False" DataKeyNames="Names" EnableModelValidation ="True" EmptyDataText="No records to display">
<EditRowStyle BackColor="#0099CC" ForeColor="Black" />
<HeaderStyle BackColor="Black" ForeColor="White" />
<RowStyle BackColor="#FFFFCC" />
<SelectedRowStyle BorderColor="#0099FF" />
</asp:GridView>
<br /><br /><br /><br />
</form>
</body>
</html>
這裏是我的代碼背後：
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;
using System.Net.Mail;
using aejw.Network;
namespace WorkOrder
{
public partial class AdminReport : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack) // this keeps from loading everytime the page does a partial laod
{
LoadDataSource1();
}
this.MaintainScrollPositionOnPostBack = true;
}
protected void btnGetResults_Click(object sender, EventArgs e)
{
LoadDataSource2();
}
protected void LoadDataSource1()
{
int i = 0;
SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["WConnectionString"].ConnectionString);
string query1 = "SELECT Name FROM sys.columns WHERE object_id = OBJECT_ID (@ObjectID)";
SqlCommand cmd = new SqlCommand(query1, conn);
conn.Open();
cmd.Parameters.AddWithValue("ObjectID", "dbo.WO_Submission_Details");
SqlDataReader rdr = cmd.ExecuteReader();
while (rdr.Read())
{
cbSelectData.Items.Insert(i, rdr.GetValue(0).ToString());
i++;
}
conn.Close();
}
protected void LoadDataSource2()
{
SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["WOConnectionString"].ConnectionString);
string query2 = "SELECT Name FROM sys.columns WHERE object_id = OBJECT_ID (@ObjectID)";
SqlCommand cmd2 = new SqlCommand(query2, conn);
conn.Open();
{
cmd2.Parameters.AddWithValue("ObjectID", cbSelectData.SelectedItem.ToString());
DataSet ds = new DataSet();
SqlDataAdapter da = new SqlDataAdapter(cmd2);
da.Fill(ds);
GridViewReport.DataSource = ds;
//cbSelectData.DataTextField = "Name";
//cbSelectData.DataValueField = "Name";
//cbSelectData.DataBind();
GridViewReport.DataBind();
conn.Close();
}
}
}
}
我在GridView綁定到數據源。我錯過了一步嗎？謝謝
我假設你使用的調試。結果是什麼？調試器中'ds.Tables [0]'的內容是什麼？你有行嗎？順便說一句，你使用的是與'CheckBoxList'相同的元查詢。 –
查詢類似，但ObjectID設置爲複選框列表selectedItem。 – user1863593