.net中activex的替代技术:winform control（一）

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.net中activex的替代技术:winform control（一）

我想做用vc做一activex控件对初始编程的人来说可能不是一件容易的事吧，在.net出现之后，有更简单的技术来替代它，那就是winform control，它可以把做好的winform control直接嵌入到IE中，对于访问本地磁盘和注册表的winform control，可能要重新设置安全策略。我们就拿多文件上传为例，进行讲述。

（一）做一winform control
上面的代码中,公布了Uri和ServerFolder属性:Uri指定上传的url地址,ServerFolder指定存放的上传文件的文件夹；这俩个属性都是可读可写的，可以在网页中通过javascript和用户交互。到此为止，上传的winform控件就完成了，非常简单。（未完待续）

using System;

using System.Collections;

using System.ComponentModel;

using System.Drawing;

using System.Data;

using System.Windows.Forms;

using System.Runtime.InteropServices;

using System.Net;

using System.IO;

namespace MultiFileUpload

{

/// <summary>

/// UserControl1 的摘要说明。

/// </summary>

public class Demo : System.Windows.Forms.UserControl

{

private System.Windows.Forms.Panel panel1;

private System.Windows.Forms.Label label1;

private System.Windows.Forms.Splitter splitter1;

private System.Windows.Forms.Panel panel2;

private System.Windows.Forms.Button button1;

private System.Windows.Forms.Splitter splitter2;

private System.Windows.Forms.Button button2;

private System.Windows.Forms.OpenFileDialog openFileDialog1;

public WebClient wc=new WebClient();

private string filestr="";

private string[] FileListArr;

private System.Windows.Forms.Splitter splitter3;

private System.Windows.Forms.ProgressBar progressBar1;

private System.Windows.Forms.Splitter splitter4;

private System.Windows.Forms.Panel panel3;

private System.Windows.Forms.ListBox listBox1;

private string uri="http://10.126.65.96/WebApplication2";//根据自己的情况设置

private string serverfolder="usercontrols";//根据自己的情况设置

/// <summary>

/// 必需的设计器变量。

/// </summary>

private System.ComponentModel.Container components = null;

public Demo()

{

// 该调用是 Windows.Forms 窗体设计器所必需的。

InitializeComponent();

// TODO: 在 InitComponent 调用后添加任何初始化

}

/// <summary>

/// 清理所有正在使用的资源。

/// </summary>

protected override void Dispose( bool disposing )

{

if( disposing )

{

if( components != null )

components.Dispose();

}

base.Dispose( disposing );

}

public string Uri

{

set

{

this.uri=value;

}

get

{

return this.uri;

}

public string ServerFolder

{

set

{

this.serverfolder=value;

}

get

{

return this.serverfolder;

}

组件设计器生成的代码

public string GetUri()

{

return this.uri;

}

public void SendFiles()

{

char[] ch=new char[1];

ch[0]='/';

string[] arrstr=this.filestr.Split(ch);

WebClient myWebClient = new WebClient();

做一存取凭据

//使用默认的权限

myWebClient.Credentials =CredentialCache.DefaultCredentials;

int count=this.listBox1.Items.Count;

this.progressBar1.Maximum=10*count;

for(int i=0;i<arrstr.Length;i++)

{

try

{

string fileNamePath=arrstr[i];

string fileName = fileNamePath.Substring(fileNamePath.LastIndexOf("//") + 1);

string uriString = this.uri+"/"+this.serverfolder+"/" + fileName;//指定上传得路径

// 要上传的文件

FileStream fs = new FileStream(fileNamePath, FileMode.Open, FileAccess.Read);

//FileStream fs = OpenFile();

BinaryReader r = new BinaryReader(fs);

//使用UploadFile方法可以用下面的格式

// myWebClient.UploadFile(uriString,"PUT",fileNamePath);

// MessageBox.Show(uriString);

byte[] postArray = r.ReadBytes((int)fs.Length);

Stream postStream = myWebClient.OpenWrite(uriString,"PUT");

if(postStream.CanWrite)

{

postStream.Write(postArray,0,postArray.Length);

this.progressBar1.Value=(i+1)*10;

}

else

{

MessageBox.Show( "文件目前不可写！");

}

postStream.Close();

}

catch(WebException errMsg)

{

MessageBox.Show("上传失败：" + errMsg.Message);

break;

}

if(this.progressBar1.Value==this.progressBar1.Maximum)

{

MessageBox.Show("成功");

}

else

{

MessageBox.Show("传送中出现错误！");

}

private void button1_Click(object sender, System.EventArgs e)

{

OpenFileDialog openFileDialog1 = new System.Windows.Forms.OpenFileDialog();

openFileDialog1.Multiselect = true;

openFileDialog1.RestoreDirectory = true;

openFileDialog1.Filter="dwg文件|*.dwg";

openFileDialog1.ShowDialog();

this.FileListArr=openFileDialog1.FileNames;

this.listBox1.Items.Clear();

for(int i=0;i<this.FileListArr.Length;i++)

{

this.listBox1.Items.Add(this.FileListArr[i]);

}

this.filestr="";

for(int i=0;i<this.FileListArr.Length;i++)

{

if(this.filestr=="")

{

this.filestr=this.FileListArr[i];

}

else

{

this.filestr=this.filestr+"/"+this.FileListArr[i];

}

private void button2_Click(object sender, System.EventArgs e)

{

this.SendFiles();

}