hello ActiveX控件

ActiveX控件似乎很遥远,C#也一样可以开发
原文
http://www.cnblogs.com/homer/archive/2005/01/04/86473.aspx
C#版ActiveX控件流程
1,建一个Winform自定义控件,生成为COM组件
2,生成安装包,可以用VS.NET生成,注册类型改为vsdrpCOM,也可以用其它工具打包成CAB文件
直接在别人项目上改,我把它做成一个上传图片的控件
客户端上传图片到服务器,我做成WebService
upload.asmx.cs
using System; using System.Collections; using System.ComponentModel; using System.Data; using System.Diagnostics; using System.Web; using System.Web.Services; using System.IO; namespace function { /// <summary> /// upload 的摘要说明。 /// </summary> public class upload : System.Web.Services.WebService { public upload() { //CODEGEN: 该调用是 ASP.NET Web 服务设计器所必需的 InitializeComponent(); } #region 组件设计器生成的代码 //Web 服务设计器所必需的 private IContainer components = null; /// <summary> /// 设计器支持所需的方法 - 不要使用代码编辑器修改 /// 此方法的内容。 /// </summary> private void InitializeComponent() { } /// <summary> /// 清理所有正在使用的资源。 /// </summary> protected override void Dispose( bool disposing ) { if(disposing && components != null) { components.Dispose(); } base.Dispose(disposing); } #endregion // WEB 服务示例 // HelloWorld() 示例服务返回字符串 Hello World // 若要生成，请取消注释下列行，然后保存并生成项目 // 若要测试此 Web 服务，请按 F5 键 // [WebMethod] // public string HelloWorld() // { // return "Hello World"; // } [WebMethod] public string UploadFile(byte[] fs,string FileName) { try { ///定义并实例化一个内存流，以存放提交上来的字节数组。 MemoryStream m = new MemoryStream(fs); ///定义实际文件对象，保存上载的文件。 FileStream f = new FileStream(Server.MapPath("upload") + "\\" + FileName, FileMode.Create); ///把内内存里的数据写入物理文件 m.WriteTo(f); m.Close(); f.Close(); f = null; m = null; return "文件已经上传成功。"; } catch(Exception ex) { return ex.Message; } } } }
添加对WebService的引用
UserControl1.cs
using System; using System.Collections; using System.ComponentModel; using System.Drawing; using System.Data; using System.Windows.Forms; using System.Runtime.InteropServices; using System.IO; namespace HelloWorld { /// <summary> /// UserControl1 的摘要说明。 /// </summary> [Guid("9551B223-6188-4387-B293-C7D9D8173E3A")] public class Demo : System.Windows.Forms.UserControl,IObjectSafety { private System.Windows.Forms.OpenFileDialog openFileDialog1; private System.Windows.Forms.Button btn_select; private System.Windows.Forms.ListBox file_list; private System.Windows.Forms.Button btn_del; private System.Windows.Forms.Button btn_upload; /// <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 ); } #region 组件设计器生成的代码 /// <summary> /// 设计器支持所需的方法 - 不要使用代码编辑器 /// 修改此方法的内容。 /// </summary> private void InitializeComponent() { this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog(); this.btn_select = new System.Windows.Forms.Button(); this.file_list = new System.Windows.Forms.ListBox(); this.btn_del = new System.Windows.Forms.Button(); this.btn_upload = new System.Windows.Forms.Button(); this.SuspendLayout(); // // openFileDialog1 // this.openFileDialog1.FileOk += new System.ComponentModel.CancelEventHandler(this.open_it); // // btn_select // this.btn_select.Location = new System.Drawing.Point(0, 88); this.btn_select.Name = "btn_select"; this.btn_select.TabIndex = 1; this.btn_select.Text = "选择文件"; this.btn_select.Click += new System.EventHandler(this.button1_Click); // // file_list // this.file_list.ItemHeight = 12; this.file_list.Location = new System.Drawing.Point(0, 0); this.file_list.Name = "file_list"; this.file_list.Size = new System.Drawing.Size(416, 88); this.file_list.TabIndex = 2; // // btn_del // this.btn_del.Location = new System.Drawing.Point(104, 88); this.btn_del.Name = "btn_del"; this.btn_del.TabIndex = 3; this.btn_del.Text = "删除选中"; this.btn_del.Click += new System.EventHandler(this.btn_del_Click); // // btn_upload // this.btn_upload.Location = new System.Drawing.Point(208, 88); this.btn_upload.Name = "btn_upload"; this.btn_upload.TabIndex = 4; this.btn_upload.Text = "上传"; this.btn_upload.Click += new System.EventHandler(this.btn_upload_Click); // // Demo // this.Controls.Add(this.btn_upload); this.Controls.Add(this.btn_del); this.Controls.Add(this.file_list); this.Controls.Add(this.btn_select); this.Name = "Demo"; this.Size = new System.Drawing.Size(416, 216); this.Load += new System.EventHandler(this.Demo_Load); this.ResumeLayout(false); } #endregion public void ShowMessage(string msg) { if(msg != null) { MessageBox.Show(msg); } } #region IObjectSafety 成员 public void GetInterfacceSafyOptions(Int32 riid, out Int32 pdwSupportedOptions, out Int32 pdwEnabledOptions) { // TODO: 添加 WebCamControl.GetInterfacceSafyOptions 实现 pdwSupportedOptions = CLsObjectSafety.INTERFACESAFE_FOR_UNTRUSTED_CALLER; pdwEnabledOptions = CLsObjectSafety.INTERFACESAFE_FOR_UNTRUSTED_DATA; } public void SetInterfaceSafetyOptions(Int32 riid, Int32 dwOptionsSetMask, Int32 dwEnabledOptions) { // TODO: 添加 WebCamControl.SetInterfaceSafetyOptions 实现 } #endregion private void open_it(object sender, System.ComponentModel.CancelEventArgs e) { btn_upload.Enabled=true; for(int i=0;i<openFileDialog1.FileNames.Length;i++) { if(file_list.Items.Contains(openFileDialog1.FileNames[i])==false) { file_list.Items.Add(openFileDialog1.FileNames[i]); } } } private void button1_Click(object sender, System.EventArgs e) { openFileDialog1.ShowDialog(); } private void btn_del_Click(object sender, System.EventArgs e) { try { file_list.Items.Remove(file_list.Items[file_list.SelectedIndex]); } catch { } } private void btn_upload_Click(object sender, System.EventArgs e) { localhost.upload up=new localhost.upload(); int count=file_list.Items.Count; int l=0; for(int i=0;i<count;i++) { int this_index=i-l; string file=file_list.Items[this_index].ToString(); FileStream stream1 = new FileStream(file,FileMode.Open,FileAccess.Read); int length=(int)stream1.Length; byte[] b = new byte[length]; stream1.Read(b, 0, length); string str=null; string filename=file.Substring(file.LastIndexOf(@"\")+1); str=up.UploadFile(b,filename); file_list.Items.Remove(file); l+=1; MessageBox.Show(str+file); } } private void Demo_Load(object sender, System.EventArgs e) { btn_upload.Enabled=false; openFileDialog1.Multiselect=true; openFileDialog1.Filter="JPEG file (*.jpg)|*.jpg|GIF file (*.gif)|*.gif"; } } }
用winform运行效果

用webform运行效果

这个...太难看了,有点小成就感