Sharepoint学习笔记---Sandbox Solution-- Full Trust Proxy--开发实例之(2、在Webpart中访问Full Trust Proxy)

上一篇Sharepoint学习笔记---Sandbox Solution-- Full Trust Proxy--开发实例之(1、创建一个能访问DataBase的Full Trust Proxy), 我们在Sharepoint的Farm Solution中创建,部署并注册了一个能访问数据库的Full trust Proxy,这一篇我们将在Sharepoint的Sandbox Solution中创建一个Webpart，并通过前面创建的Full trust proxy访问数据库，把访问结果显示在我们创建的Webpart中。
进入操作步骤。
一、创建和设置项目
  1、打开VS2010,创建一个空项目Empty SharePoint Project，命名为MyTestSandBoxAccessDBWebPart，如下图
  

  此项目为Sandbox类型的

  2、在Solution Explorer中，右击References目录，选择Add reference,在跳出的Add Reference窗口，选择Browse栏，浏览到你部署的Full trust Proxy类所在目录
C:\Windows\assembly\GAC_MSIL\My.Sharepoint.SandBox

进入对应的版本

选择My.Sharepoin.SandBox.dll类

引用成功后，可以双击此类，看到它里面定义的对应内容

 

二、创建Webpart并调用Full Trust Proxy
1、在Solution Explorer中，右击项目，选择Add,添加New Item,选择Webpart（注意：不能选择添加Visual Web Part），并命名为TestSandboxSolutionAccessDataBaseWebPart
 
2、在Solution Explorer中，双击TestDBWebpart.webpart，编辑内容如下:

此处我们设置了它的Title和Description.

3、右击Feature1，重命名为DataBaseWebPart，
 

然后双击DataBaseWebPart，打开Feature Designer，在此窗口中设置如下图

 

4、修改TestDBWebpart.cs代码如下:

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);
        }
    }
}

 在上面的代码中，如何取得Assembly Name中的相应值，可参见此文 :

Sharepoint学习笔记--- 快速确定VisualStudio2010当前Project的assembly name

 在此Webpart中，我们创建了两个TextBox,一个用于输入数据库连接字符串，一个用于输入SQL语句。同时还定义了一个按钮，并Attach了此按钮的Click事件，当点击此按钮后，后台代码会通过取得的参数，传递给Full Trust Proxy类，通过Full Trust Proxy类去访问数据库内容，然后把取得的结果传递回来，显示在Webpart上的GridView控件中。

 

三、部署并使用Webpart呈现DataBase数据库数据
 Build并部署此项目。成功后，在测试Sharepoint网站上创建一个Web Part Page，在此Page上加入部署的Webpart，然后在此Webpart的相应Text框中输入相应内容再点击Access Database按钮

可看到结果