小树建站平台,变装app制作教程,股权众筹网站开发,设计专业招聘网站假如某网站有个表单#xff0c;例如(url: http://localhost/login.aspx)#xff1a;帐号密码我们需要在程序中提交数据到这个表单#xff0c;对于这种表单#xff0c;我们可以使用 WebClient.UploadData 方法来实现#xff0c;将所要上传的数据拼成字符即可#xff0c;程…假如某网站有个表单例如(url: http://localhost/login.aspx)帐号密码我们需要在程序中提交数据到这个表单对于这种表单我们可以使用 WebClient.UploadData 方法来实现将所要上传的数据拼成字符即可程序很简单string uriString http://localhost/login.aspx; // 创建一个新的 WebClient 实例. WebClient myWebClient new WebClient(); string postData UsernameadminPasswordadmin; // 注意这种拼字符串的ContentType myWebClient.Headers.Add(Content-Type,application/x-www-form-urlencoded); // 转化成二进制数组 byte[] byteArray Encoding.ASCII.GetBytes(postData); // 上传数据并获取返回的二进制数据. byte[] responseArray myWebClient.UploadData(uriString,POST,byteArray);对于文件上传类的表单例如(url: http://localhost/uploadFile.aspx)文件对于这种表单我们可以使用String uriString http://localhost/uploadFile.aspx; // 创建一个新的 WebClient 实例. WebClient myWebClient new WebClient(); string fileName C:\upload.txt; // 直接上传并获取返回的二进制数据. byte[] responseArray myWebClient.UploadFile(uriString,POST,fileName);还有一种表单不仅有文字还有文件例如(url: http://localhost/uploadData.aspx)文件名文件对于这种表单似乎前面的两种方法都不能适用对于第一种方法不能直接拼字符串对于第二种我们只能传文件重新回到第一个方法注意参数public byte[] UploadData( string address, string method, byte[] data);在第一个例子中是通过拼字符串来得到byte[] data参数值的对于这种表单显然不行反过来想想对于uploadData.aspx这样的程序来说直接通过网页提交数据后台所获取到的流是什么样的呢在我以前的一篇blog中曾分析过这个问题asp无组件上传进度条解决方案最终的数据如下-----------------------------7d429871607fe
Content-Disposition: form-data; namefile1; filenameG:\homepage.txt
Content-Type: text/plain
宝玉http://www.webuc.net
-----------------------------7d429871607fe
Content-Disposition: form-data; namefilename
default filename
-----------------------------7d429871607fe--所以只要拼一个这样的byte[] data数据Post过去就可以达到同样的效果了。但是一定要注意对于这种带有文件上传的其ContentType是不一样的例如上面的这种其ContentType为multipart/form-data; boundary---------------------------7d429871607fe。有了ContentType我们就可以知道boundary(就是上面的---------------------------7d429871607fe)知道boundary了我们就可以构造出我们所需要的byte[] data了最后不要忘记把我们构造的ContentType传到WebClient中例如:webClient.Headers.Add(Content-Type, ContentType);这样就可以通过WebClient.UploadData 方法上载文件数据了。具体代码如下生成二进制数据类的封装using System;using System.Web;using System.IO;using System.Net;using System.Text;using System.Collections; namespace UploadData.Common...{ /** summary /// 创建WebClient.UploadData方法所需二进制数组 /// /summary public class CreateBytes ...{ Encoding encoding Encoding.UTF8; /** summary /// 拼接所有的二进制数组为一个数组 /// /summary /// param namebyteArrays数组/param /// returns/returns /// remarks加上结束边界/remarks public byte[] JoinBytes(ArrayList byteArrays) ...{ int length 0; int readLength 0; // 加上结束边界 string endBoundary Boundary --\r\n; //结束边界 byte[] endBoundaryBytes encoding.GetBytes(endBoundary); byteArrays.Add(endBoundaryBytes); foreach(byte[] b in byteArrays) ...{ length b.Length; } byte[] bytes new byte[length]; // 遍历复制 // foreach(byte[] b in byteArrays) ...{ b.CopyTo(bytes, readLength); readLength b.Length; } return bytes; } public bool UploadData(string uploadUrl, byte[] bytes, out byte[] responseBytes) ...{ WebClient webClient new WebClient(); webClient.Headers.Add(Content-Type, ContentType); try ...{ responseBytes webClient.UploadData(uploadUrl, bytes); return true; } catch (WebException ex) ...{ Stream resp ex.Response.GetResponseStream(); responseBytes new byte[ex.Response.ContentLength]; resp.Read(responseBytes, 0, responseBytes.Length); } return false; } /** summary /// 获取普通表单区域二进制数组 /// /summary /// param namefieldName表单名/param /// param namefieldValue表单值/param /// returns/returns /// remarks /// -----------------------------7d52ee27210a3c\r\nContent-Disposition: form-data; name\表单名\\r\n\r\n表单值\r\n /// /remarks public byte[] CreateFieldData(string fieldName, string fieldValue) ...{ string textTemplate Boundary \r\nContent-Disposition: form-data; name\{0}\\r\n\r\n{1}\r\n; string text String.Format(textTemplate, fieldName, fieldValue); byte[] bytes encoding.GetBytes(text); return bytes; } /** summary /// 获取文件上传表单区域二进制数组 /// /summary /// param namefieldName表单名/param /// param namefilename文件名/param /// param namecontentType文件类型/param /// param namecontentLength文件长度/param /// param namestream文件流/param /// returns二进制数组/returns public byte[] CreateFieldData(string fieldName, string filename,string contentType, byte[] fileBytes) ...{ string end \r\n; string textTemplate Boundary \r\nContent-Disposition: form-data; name\{0}\; filename\{1}\\r\nContent-Type: {2}\r\n\r\n; // 头数据 string data String.Format(textTemplate, fieldName, filename, contentType); byte[] bytes encoding.GetBytes(data); // 尾数据 byte[] endBytes encoding.GetBytes(end); // 合成后的数组 byte[] fieldData new byte[bytes.Length fileBytes.Length endBytes.Length]; bytes.CopyTo(fieldData, 0); // 头数据 fileBytes.CopyTo(fieldData, bytes.Length); // 文件的二进制数据 endBytes.CopyTo(fieldData, bytes.Length fileBytes.Length); // \r\n return fieldData; } 属性#region 属性 public string Boundary ...{ get ...{ string[] bArray, ctArray; string contentType ContentType; ctArray contentType.Split(;); if (ctArray[0].Trim().ToLower() multipart/form-data) ...{ bArray ctArray[1].Split(); return -- bArray[1]; } return null; } } public string ContentType ...{ get ...{ if (HttpContext.Current null) ...{ return multipart/form-data; boundary---------------------------7d5b915500cee; } return HttpContext.Current.Request.ContentType; } } #endregion }} 在Winform中调用 using System;using System.Drawing;using System.Collections;using System.ComponentModel;using System.Windows.Forms;using System.Data; using UploadData.Common;using System.IO; namespace UploadDataWin...{ /** summary /// frmUpload 的摘要说明。 /// /summary public class frmUpload : System.Windows.Forms.Form ...{ private System.Windows.Forms.Label lblAmigoToken; private System.Windows.Forms.TextBox txtAmigoToken; private System.Windows.Forms.Label lblFilename; private System.Windows.Forms.TextBox txtFilename; private System.Windows.Forms.Button btnBrowse; private System.Windows.Forms.TextBox txtFileData; private System.Windows.Forms.Label lblFileData; private System.Windows.Forms.Button btnUpload; private System.Windows.Forms.OpenFileDialog openFileDialog1; private System.Windows.Forms.TextBox txtResponse; /** summary /// 必需的设计器变量。 /// /summary private System.ComponentModel.Container components null; public frmUpload() ...{ // // Windows 窗体设计器支持所必需的 // InitializeComponent(); // // TODO: 在 InitializeComponent 调用后添加任何构造函数代码 // } /** 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 ); } Windows 窗体设计器生成的代码#region Windows 窗体设计器生成的代码 /** 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.lblAmigoToken new System.Windows.Forms.Label(); this.txtAmigoToken new System.Windows.Forms.TextBox(); this.lblFilename new System.Windows.Forms.Label(); this.txtFilename new System.Windows.Forms.TextBox(); this.btnBrowse new System.Windows.Forms.Button(); this.txtFileData new System.Windows.Forms.TextBox(); this.lblFileData new System.Windows.Forms.Label(); this.btnUpload new System.Windows.Forms.Button(); this.openFileDialog1 new System.Windows.Forms.OpenFileDialog(); this.txtResponse new System.Windows.Forms.TextBox(); this.SuspendLayout(); // // lblAmigoToken // this.lblAmigoToken.Location new System.Drawing.Point(40, 48); this.lblAmigoToken.Name lblAmigoToken; this.lblAmigoToken.Size new System.Drawing.Size(72, 23); this.lblAmigoToken.TabIndex 0; this.lblAmigoToken.Text AmigoToken; // // txtAmigoToken // this.txtAmigoToken.Location new System.Drawing.Point(120, 48); this.txtAmigoToken.Name txtAmigoToken; this.txtAmigoToken.Size new System.Drawing.Size(248, 21); this.txtAmigoToken.TabIndex 1; this.txtAmigoToken.Text ; // // lblFilename // this.lblFilename.Location new System.Drawing.Point(40, 96); this.lblFilename.Name lblFilename; this.lblFilename.Size new System.Drawing.Size(80, 23); this.lblFilename.TabIndex 2; this.lblFilename.Text Filename; // // txtFilename // this.txtFilename.Location new System.Drawing.Point(120, 96); this.txtFilename.Name txtFilename; this.txtFilename.Size new System.Drawing.Size(248, 21); this.txtFilename.TabIndex 3; this.txtFilename.Text ; // // btnBrowse // this.btnBrowse.Location new System.Drawing.Point(296, 144); this.btnBrowse.Name btnBrowse; this.btnBrowse.TabIndex 4; this.btnBrowse.Text 浏览...; this.btnBrowse.Click new System.EventHandler(this.btnBrowse_Click); // // txtFileData // this.txtFileData.Location new System.Drawing.Point(120, 144); this.txtFileData.Name txtFileData; this.txtFileData.Size new System.Drawing.Size(168, 21); this.txtFileData.TabIndex 5; this.txtFileData.Text ; // // lblFileData // this.lblFileData.Location new System.Drawing.Point(40, 144); this.lblFileData.Name lblFileData; this.lblFileData.Size new System.Drawing.Size(72, 23); this.lblFileData.TabIndex 6; this.lblFileData.Text FileData; // // btnUpload // this.btnUpload.Location new System.Drawing.Point(48, 184); this.btnUpload.Name btnUpload; this.btnUpload.TabIndex 7; this.btnUpload.Text Upload; this.btnUpload.Click new System.EventHandler(this.btnUpload_Click); // // txtResponse // this.txtResponse.Location new System.Drawing.Point(136, 184); this.txtResponse.Multiline true; this.txtResponse.Name txtResponse; this.txtResponse.Size new System.Drawing.Size(248, 72); this.txtResponse.TabIndex 8; this.txtResponse.Text ; // // frmUpload // this.AutoScaleBaseSize new System.Drawing.Size(6, 14); this.ClientSize new System.Drawing.Size(400, 269); this.Controls.Add(this.txtResponse); this.Controls.Add(this.btnUpload); this.Controls.Add(this.lblFileData); this.Controls.Add(this.txtFileData); this.Controls.Add(this.btnBrowse); this.Controls.Add(this.txtFilename); this.Controls.Add(this.lblFilename); this.Controls.Add(this.txtAmigoToken); this.Controls.Add(this.lblAmigoToken); this.Name frmUpload; this.Text frmUpload; this.ResumeLayout(false); } #endregion /** summary /// 应用程序的主入口点。 /// /summary [STAThread] static void Main() ...{ Application.Run(new frmUpload()); } private void btnUpload_Click(object sender, System.EventArgs e) ...{ // 非空检验 if (txtAmigoToken.Text.Trim() || txtFilename.Text || txtFileData.Text.Trim() ) ...{ MessageBox.Show(Please fill data); return; } // 所要上传的文件路径 string path txtFileData.Text.Trim(); // 检查文件是否存在 if (!File.Exists(path)) ...{ MessageBox.Show({0} does not exist!, path); return; } // 读文件流 FileStream fs new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read); // 这部分需要完善 string ContentType application/octet-stream; byte[] fileBytes new byte[fs.Length]; fs.Read(fileBytes, 0, Convert.ToInt32(fs.Length)); // 生成需要上传的二进制数组 CreateBytes cb new CreateBytes(); // 所有表单数据 ArrayList bytesArray new ArrayList(); // 普通表单 bytesArray.Add(cb.CreateFieldData(FileName, txtFilename.Text)); bytesArray.Add(cb.CreateFieldData(AmigoToken, txtAmigoToken.Text)); // 文件表单 bytesArray.Add(cb.CreateFieldData(FileData, path , ContentType, fileBytes)); // 合成所有表单并生成二进制数组 byte[] bytes cb.JoinBytes(bytesArray); // 返回的内容 byte[] responseBytes; // 上传到指定Url bool uploaded cb.UploadData(http://localhost/UploadData/UploadAvatar.aspx, bytes, out responseBytes); // 将返回的内容输出到文件 using (FileStream file new FileStream(c:\response.text, FileMode.Create, FileAccess.Write, FileShare.Read)) ...{ file.Write(responseBytes, 0, responseBytes.Length); } txtResponse.Text System.Text.Encoding.UTF8.GetString(responseBytes); } private void btnBrowse_Click(object sender, System.EventArgs e) ...{ if(openFileDialog1.ShowDialog() DialogResult.OK) ...{ txtFileData.Text openFileDialog1.FileName; } } }}转载于:https://www.cnblogs.com/MaxWoods/archive/2009/12/23/1630921.html
