C#文件上传下载
1、文件上传
/// <summary>
/// WebClient上传文件至服务器
/// </summary>
/// <param name="fileNamePath">文件名，全路径格式</param>
/// <param name="uriString">服务器文件夹路径</param>
private void UpLoadFile(string fileNamePath, string uriString)
{
string fileName = fileNamePath.Substring(fileNamePath.LastIndexOf("\\") + 1);
NewFileName = DateTime.Now.ToString("yyMMddhhmmss") + DateTime.Now.Millisecond.ToString() + fileNamePath.Substring(fileNamePath.LastIndexOf("."));
string fileNameExt = fileName.Substring(fileName.LastIndexOf(".") + 1);
if (uriString.EndsWith("/") == false) uriString = uriString + "/";
uriString = uriString + NewFileName;
UpFileName = NewFileName;
/**/
/// 创建WebClient实例
WebClient myWebClient = new WebClient();
myWebClient.Credentials = CredentialCache.DefaultCredentials;
// 要上传的文件
FileStream fs = new FileStream(fileNamePath, FileMode.Open, FileAccess.Read);
//FileStream fs = OpenFile();
BinaryReader r = new BinaryReader(fs);
try
{
//使用UploadFile方法可以用下面的格式
//myWebClient.UploadFile(uriString,"PUT",fileNamePath);
byte[] postArray = r.ReadBytes((int)fs.Length);
Stream postStream = myWebClient.OpenWrite(uriString, "PUT");
if (postStream.CanWrite)
{
postStream.Write(postArray, 0, postArray.Length);
}
else
{
MessageBox.Show("文件目前不可写！");
}
postStream.Close();
}
catch
{
MessageBox.Show("文件上传失败，请稍候重试~");
}
}
2、文件下载
string filePath = System.AppDomain.CurrentDomain.BaseDirectory.ToString()+"ProgramOut.xml";//路径
WebClient client = new WebClient();
string fileName = filePath.Substring(filePath.LastIndexOf("\\") + 1); //被下载的文件名
SaveFileDialog saveFileDialog = new SaveFileDialog();
saveFileDialog.Filter = "XML文件|*.xml";
saveFileDialog.FilterIndex = 2;
saveFileDialog.RestoreDirectory = true;
if (saveFileDialog.ShowDialog() == DialogResult.OK)
{
string fName = saveFileDialog.FileName;
string Path = fName; //另存为的绝对路径＋文件名
try
{
WebRequest myre = WebRequest.Create(Path);
}
catch
{
MessageBox.Show("文件下载失败", "Error");
}
try
{
client.DownloadFile(filePath, Path);
MessageBox.Show("文件导出成功！！", "系统提示！", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
catch
{
MessageBox.Show("文件下载失败", "Error");
}