ASP.net網站DataBind到SQL服務器

Question

我一直在這個網站上VS 2012 for Web 2012的工作。它大部分是HTML和ASP，但我已經包含從SourceForge下載的DayPilot日曆。顯然，我必須將日曆數據綁定到我的SQL服務器，以便用戶可以在日曆上登錄併爲自己留出時間。我已經使用了幾乎所有可以在網上找到的推薦代碼，但在日曆頁面上似乎沒有任何工作。 這裏是aspx頁面和頁面aspx.vb代碼： （aspx頁面）

<%@ Page Title="" Language="VB" MasterPageFile="~/MasterPage.master" AutoEventWireup="false" CodeFile="calendarpg.aspx.vb" Inherits="_Default" %> 

    <%@ Register Assembly="DayPilot" Namespace="DayPilot.Web.Ui" TagPrefix="DayPilot" %> 

    <asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server"> 
    <script type="text/javascript" src="<%=ResolveUrl("~/Scripts/DayPilot/calendar.js")%>">   
    </script> 
    <style type="text/css"> 
      .auto-style8 { 
      font-size: large; 
     } 
    </style> 
    <link type="text/css" rel="stylesheet" href="<%=ResolveUrl("~/Themes/themes.css")%>" /> 
    </asp:Content> 
    <asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server"> 
    dbo.BasicData 
    <DayPilot:DayPilotNavigator ID="DayPilotNavigator1" runat="server" /> 
    <DayPilot:DayPilotCalendar ID="DayPilotCalendar1" runat="server" Days="7" EventMoveJavaScript="alert('eventMove(e.start(), newEnd')" BackColor="#CCFFFF" DataStartField="null"></DayPilot:DayPilotCalendar> 
    <DayPilot:DayPilotScheduler ID="DayPilotScheduler1" runat="server">  
    </DayPilot:DayPilotScheduler> 
    <br /> 
    <h1><strong>Scheduling</strong></h1> 
    <span class="auto-style8">Requests are made via the Calendar for each of the respective Sandboxes. 
    A minimum of 24-hour notice is rquired when making a request to allow 
    time for preparation of a Sandbox, 
    <br /> 
    time zone differences, and to resolve any 
    scheduling conflicts. 
    <br /> 
    <br /> 
    The process for booking is similar to booking a conference room. 
    <br /> 
    <br /> 
    Choose a day and time that is open, for the Sandbox you're interested in using, 
    then choose the open hours that work best for your schedule. </span> 
    </asp:Content> 

（aspx.vb頁）

Partial Class _Default 
Inherits System.Web.UI.Page 
'Declaration 
Public Event DataBinding As EventHandler 

Private Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load 
DayPilotCalendar1.DataSource = getData() 
DataBind() 
End Sub 

Public Function getData() As Data.DataTable 
Dim dt As Data.DataTable 
dt = New Data.DataTable 

dt.Columns.Add("start", GetType(DateTime)) 
dt.Columns.Add("end", GetType(DateTime)) 
dt.Columns.Add("name", GetType(String)) 
dt.Columns.Add("id", GetType(String)) 

Dim dr As Data.DataRow = dt.NewRow() 
dr("id") = 0 
dr("start") = Convert.ToDateTime("15:50") 
dr("end") = Convert.ToDateTime("15:55") 
dr("name") = "Event 1" 
dt.Rows.Add(dr) 

dr = dt.NewRow() 
dr("id") = 1 
dr("start") = Convert.ToDateTime("16:00") 
dr("end") = Convert.ToDateTime("17:00") 
dr("name") = "Event 2" 
dt.Rows.Add(dr) 

dr = dt.NewRow() 
dr("id") = 2 
dr("start") = Convert.ToDateTime("16:15") 
dr("end") = Convert.ToDateTime("18:45") 
dr("name") = "Event 3" 
dt.Rows.Add(dr) 

Return dt 
End Function 
End Class 

（這是我的web.config頁面，因爲它代表現在）

<using System.Web.Configuration; /> 
    <?xml version="1.0" encoding="utf-8"?> 
    <!-- 
    For more information on how to configure your ASP.NET application, please visit 
    http://go.microsoft.com/fwlink/?LinkId=169433 
    --> 
    <configuration> 
    <connectionStrings> 
    <add name="ConnStringDb1" connectionString="DataSource=Win08-SDBX1\SQLExpress;Initial Catalog=aspnetdb;Integrated Security=True" providerName="System.Data.SqlClient" /> 
    </connectionStrings> 
    <system.web> 
    <compilation debug="true" strict="false" explicit="true" targetFramework="4.5"> 
     <assemblies> 
     <add assembly="Microsoft.VisualBasic, Version=10.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A" /> 
     <add assembly="Microsoft.VisualC, Version=10.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A" /> 
     <add assembly="Microsoft.VisualStudio.Tools.Applications.Adapter.v9.0, Version=9.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A" /> 
     <add assembly="Microsoft.VisualStudio.Tools.Applications.DesignTime.v9.0, Version=9.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A" /> 
     <add assembly="Microsoft.VisualStudio.Tools.Applications.Hosting.v9.0, Version=9.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A" /> 
     <add assembly="Microsoft.VisualStudio.Tools.Applications.ProgrammingModel, Version=9.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A" /> 
     <add assembly="Microsoft.VisualStudio.Tools.Applications.Runtime.v9.0, Version=9.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A" /> 
     <add assembly="System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A" /> 
     </assemblies> 
    </compilation> 
    <httpRuntime targetFramework="4.5" /> 
    <pages> 
     <controls> 
     <add tagPrefix="ajaxToolkit" assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" /> 
     </controls> 
    </pages> 
    </system.web> 
    </configuration> 

如果有任何意義，或者你看到我要去哪裏出錯，請分享或更正我的編碼。謝謝！

Answer 1

Private Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load 
DayPilotCalendar1.DataSource = getData() 
DataBind() 
End Sub 

This need to be 

Private Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load 
DayPilotCalendar1.DataSource = getData() 
DayPilotCalendar1.DataBind() 
End Sub 

Answer 2

我們可以看到PageLoad調用的Databind函數嗎？

當我在處理C＃asp.net應用程序時，遇到類似問題。我創建了一個方法來綁定包含一張牌的數據集中的數據。當加載表「NullReferenceException未被用戶代碼處理」時，拋出並查看錶時，我可以看到一個空值被持有。

當您正在調試並拋出異常時，顯示的數據表的保留值是什麼？

如果它爲空，那麼你的表不是指對象。