Sharepoint学习笔记---SPList--使用Linq to Sharepoint间接查询External List(2.复制External List内容)
上一篇(Sharepoint学习笔记---SPList--使用Linq to Sharepoint间接查询External List(1.通过BCS创建External List))我们创建了一个名为NWCustomer的External List,它的内容来自于SQL SERVER数据库的Northwind的Customer表。此处我们将讲述如何创建一个Customer List来快速引用External List并通过代码复制NWCustomer的Items。在此基础上,我们将在下一篇讲述如何使用Linq来查询相关信息(arepoint学习笔记---SPList--使用Linq to Sharepoint间接查询External List(3.使用Linq to Sharepoint查询List内容))
因此,本文主要分为两大部分。
1、创建Customer List: ACustomer,并基于此List,创建Lookup Column来引用 NWCustomer List的字段
打开的你网站,点击Action下的More Options,进入下面的界面,点击Customer List
Customer List命名为ACustomer,并设置在Quich Launch栏上显示出来
创建好ACustomer List后,在Quich Launch栏点击它,进入它的List Setting设置界面
在List Setting设置界面上,点击Create Column链接,以创建一个新的Column
在Create Column界面中 ,按下图设置相关属性。在此处我们设置此Column为Lookup类型,并让它从NWCustomer List中获取信息,
在ACustomer的此Column的默认View中,我们选择显示NWCustomer List的所有字段。
设置完成并按Create按钮后,进入如下效果,我们可以看到一个没有任何Item的ACustomer List。也就是说,我们在上面的步骤中,搭好了一个ACustomer的框架,下面我们将使用代码来从NWCustomer List中批量复制Item信息到我们此处创建的ACustomer List中。
2、使用代码快速复制NWCustomer List的内容给ACustomer List。
打开VS2010,新建一个Empty Sharepoint Project,此处我们命名为CopyListContent,此部分,我们将使用此项目来完成对NWCustomer List内容的复制,在下一部分,我们还会基于此项目完成创建一个Visual Web Part来通过Linq to Sharepoint展示我们对ACustomer List的查询操作。在这一步,我们设置如下图:
把项目关联到我们的测试网站
创建好空项目后,在此项目下新建一个Visual Web Part
在此Visual WebPart上添加一个按钮,并定义此按钮的Click事件。
WPCopyListContentUserControl.ascx控件的定义代码如下:
<%@ Assembly Name="Microsoft.Web.CommandUI, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>
<%@ Register Tagprefix="SharePoint" Namespace="Microsoft.SharePoint.WebControls" Assembly="Microsoft.SharePoint, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>
<%@ Register Tagprefix="Utilities" Namespace="Microsoft.SharePoint.Utilities" Assembly="Microsoft.SharePoint, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>
<%@ Register Tagprefix="asp" Namespace="System.Web.UI" Assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" %>
<%@ Import Namespace="Microsoft.SharePoint" %>
<%@ Register Tagprefix="WebPartPages" Namespace="Microsoft.SharePoint.WebPartPages" Assembly="Microsoft.SharePoint, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>
<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="WPCopyListContentUserControl.ascx.cs" Inherits="CopyListContent.WPCopyListContent.WPCopyListContentUserControl" %>
<div>
<asp:Button ID="btnCopyList" runat="server"
Text="Copy List From External List To Customer List" Width="336px"
Height="34px" onclick="btnCopyList_Click" />
</div>
用于复制List Item的代码如下:
protected void SpCopyToLookUpList(string sourceListName, string desListName)
{
SPWeb currentWeb = SPContext.Current.Web;
// Get a reference to the source list and dest List
SPList sourceList = currentWeb.Lists[sourceListName];
SPList destList = currentWeb.Lists[desListName];
// copy items
foreach (SPListItem item in sourceList.Items)
{
CopyToLookUpItem(item, destList);
}
destList.Update();
}
#endregion
#region Copy List Items
private SPListItem CopyToLookUpItem(SPListItem sourceItem, SPList destinationList)
{
//Copy sourceItem to destinationList
SPListItem targetItem = destinationList.Items.Add();
foreach (SPField f in sourceItem.Fields)
{
//Copy all except attachments.
if (!f.ReadOnlyField && f.InternalName != "Attachments"
&& null != sourceItem[f.InternalName])
{
targetItem["BCSFind: " + f.InternalName] = sourceItem[f.InternalName];
}
if (f.Title == "CustomerID")
{
targetItem["BCSFind: " + f.Title] = sourceItem[f.Title];
targetItem["Title"] = sourceItem[f.Title];
}
}
targetItem.Update();
//Copy attachments
foreach (string fileName in sourceItem.Attachments)
{
SPFile file = sourceItem.ParentList.ParentWeb.GetFile(sourceItem.Attachments.UrlPrefix + fileName);
byte[] imageData = file.OpenBinary();
targetItem.Attachments.Add(fileName, imageData);
}
return targetItem;
}
#endregion
WPCopyListContentUserControl.ascx.cs全部代码如下(包括上面的List Copy代码)
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using Microsoft.SharePoint;
namespace CopyListContent.WPCopyListContent
{
public partial class WPCopyListContentUserControl : UserControl
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void btnCopyList_Click(object sender, EventArgs e)
{
string sourceListName = "NWCustomer";
string destiListName = "ACustomer";
SpCopyToLookUpList(sourceListName, destiListName);
}
#region Copy List From Exteranl List To Customer List
protected void SpCopyToLookUpList(string sourceListName, string desListName)
{
SPWeb currentWeb = SPContext.Current.Web;
// Get a reference to the source list and dest List
SPList sourceList = currentWeb.Lists[sourceListName];
SPList destList = currentWeb.Lists[desListName];
// copy items
foreach (SPListItem item in sourceList.Items)
{
CopyToLookUpItem(item, destList);
}
destList.Update();
}
#endregion
#region Copy List Items
private SPListItem CopyToLookUpItem(SPListItem sourceItem, SPList destinationList)
{
//Copy sourceItem to destinationList
SPListItem targetItem = destinationList.Items.Add();
foreach (SPField f in sourceItem.Fields)
{
//Copy all except attachments.
if (!f.ReadOnlyField && f.InternalName != "Attachments"
&& null != sourceItem[f.InternalName])
{
targetItem["BCSFind: " + f.InternalName] = sourceItem[f.InternalName];
}
if (f.Title == "CustomerID")
{
targetItem["BCSFind: " + f.Title] = sourceItem[f.Title];
targetItem["Title"] = sourceItem[f.Title];
}
}
targetItem.Update();
//Copy attachments
foreach (string fileName in sourceItem.Attachments)
{
SPFile file = sourceItem.ParentList.ParentWeb.GetFile(sourceItem.Attachments.UrlPrefix + fileName);
byte[] imageData = file.OpenBinary();
targetItem.Attachments.Add(fileName, imageData);
}
return targetItem;
}
#endregion
}
}
创建好Visual WebPart及其相关代码后,整个项目如下图:
把项目Build并部署到网站上。然后在此网站上创建一个WebPart页,在此页上引入我们上面创建的Visual WebPart控件,效果如下图:
点击按钮,执行从NWCustomer List复制Items到ACustomer List的操作。完成后,进入网站点击ACustomer List,可以看到内容已经成功复制到此List下,效果如下图:
如果你在复制Customer List的过程中有什么问题,想要清除Destination List(目标列表,此处就是ACustomer List)中的数据,则可以参照此文(Sharepoint学习笔记---SPList--清除List下的items与folders)用代码快速删除,当然,你也可以手动实现删除。