//发送文件  
private void btnFile_Click(object sender, EventArgs e)          
 { 
        OpenFileDialog fileDialog = new OpenFileDialog(); 
        fileDialog.Multiselect = true;
        fileDialog.Title = "请选择文件";   
        fileDialog.Filter="所有文件(*.*)|*.*";
        if (fileDialog.ShowDialog() == DialogResult.OK) 
              {    
               string file=fileDialog.FileName;    
               MessageBox.Show("已选择文件:" + file,"选择文件提示",MessageBoxButtons.OK,MessageBoxIcon.Information);   
              }       
    }           
         //发送文件夹         
         private void btnPath_Click(object sender, EventArgs e) 
         {      
               FolderBrowserDialog dialog = new FolderBrowserDialog();     
               dialog.Description = "请选择文件路径";      
               if (dialog.ShowDialog() == DialogResult.OK)     
               {         
                     string foldPath = dialog.SelectedPath;    
                     MessageBox.Show("已选择文件夹:" + foldPath, "选择文件夹提示", MessageBoxButtons.OK, MessageBoxIcon.Information);      
               }  
         }