上一篇Sharepoint學習筆記---Sandbox Solution-- Full Trust Proxy--開發實例之(1、創建一個能訪問DataBase的Full Trust Proxy), 我們在Sharepoint的Farm Solution中創建,部署并注冊了一個能訪問數據庫的Full trust Proxy,這一篇我們將在Sharepoint的Sandbox Solution中創建一個Webpart，并通過前面創建的Full trust proxy訪問數據庫，把訪問結果顯示在我們創建的Webpart中。
進入操作步驟。
一、創建和設置項目
? 1、打開VS2010,創建一個空項目Empty SharePoint Project，命名為MyTestSandBoxAccessDBWebPart，如下圖
??

? 此項目為Sandbox類型的

? 2、在Solution Explorer中，右擊References目錄，選擇Add reference,在跳出的Add Reference窗口，選擇Browse欄，瀏覽到你部署的Full trust Proxy類所在目錄
C:\Windows\assembly\GAC_MSIL\My.Sharepoint.SandBox

進入對應的版本

選擇My.Sharepoin.SandBox.dll類

引用成功后，可以雙擊此類，看到它里面定義的對應內容

?

二、創建Webpart并調用Full Trust Proxy
1、在Solution Explorer中，右擊項目，選擇Add,添加New Item,選擇Webpart（注意：不能選擇添加Visual Web Part），并命名為TestSandboxSolutionAccessDataBaseWebPart
?
2、在Solution Explorer中，雙擊TestDBWebpart.webpart，編輯內容如下:

此處我們設置了它的Title和Description.

3、右擊Feature1，重命名為DataBaseWebPart，
?

然后雙擊DataBaseWebPart，打開Feature Designer，在此窗口中設置如下圖

?

4、修改TestDBWebpart.cs代碼如下:

using?System;
using?System.ComponentModel;
using?System.Web;
using?System.Web.UI;
using?System.Web.UI.WebControls;
using?System.Web.UI.WebControls.WebParts;
using?Microsoft.SharePoint;
using?Microsoft.SharePoint.WebControls;

using?Microsoft.SharePoint.UserCode;
using?Microsoft.SharePoint.Administration;
using?Microsoft.SharePoint.Utilities;
using?System.Data;
using?My.Sharepoint.SandBox;

namespace?MyTestSandBoxAccessDBWebPart.TestDBWebpart
{
????[ToolboxItemAttribute(false)]
????public?class?TestDBWebpart?:?WebPart
????{
????????private?TextBox?txtDBConnection?=?new?TextBox()?{?Text?=?@"Data?Source=Data?Source=serverDB;Initial?Catalog=MyDb;User?ID=MyApp;Password=mypwd"?};
????????private?TextBox?txtSQLCommand?=?new?TextBox()?{?Text?=?@"SELECT?TOP(100)*?FROM?dbo.myTable"?};

????????private?Label?results?=?new?Label();
????????private?Label?lblFileContent?=?new?Label()?{?Text?=?"Input?DBConnectionStr?:"?};
????????private?Label?lblFileName?=?new?Label()?{?Text?=?"Input?SQL?Command?:"?};

????????private?Button?btnAccessDatabase?=?new?Button()?{?Text?=?"Access?Database"?};
????????private?GridView?gv?=?new?GridView();

????????public?TestDBWebpart()
????????{
????????????#region??ProxyOne

????????????string?assemblyName?=?"My.Sharepoint.SandBox,?Version=1.0.0.0,?Culture=neutral,?PublicKeyToken=9f460c3b7a15fdf1";
????????????string?typeName?=?"My.Sharepoint.SandBox.MyTestSandBoxAccessDBInfo.TestProxyCode.SQLProxyExecute";

????????????try
????????????{
????????????????btnAccessDatabase.Click?+=?(object?sender,?EventArgs?e)?=>
????????????????{
????????????????????string?DBConnectionString?=?txtDBConnection.Text.ToString().Trim();
????????????????????string?SQLCommandStr?=?txtSQLCommand.Text.ToString().Trim();

????????????????????DataTable?dt?=?((DataSet)SPUtility.ExecuteRegisteredProxyOperation(assemblyName,?typeName,
????????????????????????new?My.Sharepoint.SandBox.MyTestSandBoxAccessDBInfo.TestProxyCode.SQLProxyArgs(DBConnectionString,?SQLCommandStr))).Tables[0];
????????????????????gv.DataSource?=?dt;
????????????????????gv.DataBind();
????????????????};
????????????}
????????????catch?(Exception?ex)
????????????{
????????????????results.Text?=?ex.ToString();
????????????}
????????????#endregion

????????}

????????protected?override?void?CreateChildControls()
????????{
????????????Table?layoutTable?=?new?Table();

????????????#region?Create?Table
????????????//Input?File?Content?Row
????????????layoutTable.Rows.Add(new?TableRow());
????????????layoutTable.Rows[0].Cells.Add(new?TableCell());
????????????layoutTable.Rows[0].Cells.Add(new?TableCell());

????????????//Input?File?Location?Row
????????????layoutTable.Rows.Add(new?TableRow());
????????????layoutTable.Rows[1].Cells.Add(new?TableCell());
????????????layoutTable.Rows[1].Cells.Add(new?TableCell());

????????????//Create?File?button?Row
????????????layoutTable.Rows.Add(new?TableRow());
????????????layoutTable.Rows[2].Cells.Add(new?TableCell()?{?ColumnSpan?=?2?});

????????????//Show?Result?Row
????????????layoutTable.Rows.Add(new?TableRow());
????????????layoutTable.Rows[3].Cells.Add(new?TableCell()?{?ColumnSpan?=?2?});

????????????txtDBConnection.Width?=?400;
????????????txtSQLCommand.Width?=?400;

????????????layoutTable.Rows[0].Cells[0].Controls.Add(lblFileContent);
????????????layoutTable.Rows[0].Cells[1].Controls.Add(txtDBConnection);

????????????layoutTable.Rows[1].Cells[0].Controls.Add(lblFileName);
????????????layoutTable.Rows[1].Cells[1].Controls.Add(txtSQLCommand);

????????????layoutTable.Rows[2].Cells[0].Controls.Add(btnAccessDatabase);
????????????layoutTable.Rows[3].Cells[0].Controls.Add(results);

????????????#endregion

????????????this.Controls.Add(layoutTable);
????????????this.Controls.Add(gv);
????????????base.CreateChildControls();
????????}


????????protected?override?void?RenderContents(HtmlTextWriter?writer)
????????{
????????????base.RenderContents(writer);
????????}
????}
}

?在上面的代碼中，如何取得Assembly Name中的相應值，可參見此文 :

Sharepoint學習筆記--- 快速確定VisualStudio2010當前Project的assembly name

?在此Webpart中，我們創建了兩個TextBox,一個用于輸入數據庫連接字符串，一個用于輸入SQL語句。同時還定義了一個按鈕，并Attach了此按鈕的Click事件，當點擊此按鈕后，后臺代碼會通過取得的參數，傳遞給Full Trust Proxy類，通過Full Trust Proxy類去訪問數據庫內容，然后把取得的結果傳遞回來，顯示在Webpart上的GridView控件中。

?

三、部署并使用Webpart呈現DataBase數據庫數據
?Build并部署此項目。成功后，在測試Sharepoint網站上創建一個Web Part Page，在此Page上加入部署的Webpart，然后在此Webpart的相應Text框中輸入相應內容再點擊Access Database按鈕

可看到結果

總結

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