在WinForm中上传图片到服务器

因为WinForm都是运行在本地的,而我们的网站一般都是布署在服务器上,运行在服务器上的,所以在网站上面上传文件,就好似于保存文件到本地。但在WinForm上就不一样了,本章我们简单举一个在WinForm利用WebService上传文件到服务器的方法:

首先们先创建一个WebService服务,该服务包含一个UpdateFile方法,该方法接收两个byte[]与string类型参数。该方法非常简单,就是按照string参数指定的路径和名称将byte[]参数值保存到服务器,代码如下:

[WebService(Namespace = "http://tempuri.org/")] [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] [System.ComponentModel.ToolboxItem(false)] public class WebService : System.Web.Services.WebService { [WebMethod] public bool UpdateFile(byte[] content, string pathandname) { File.WriteAllBytes(Server.MapPath(pathandname), content); } }

为了安全,我们可以验证一下pathandname的值,使其只保存图片格式的文件。全部代码如下:

[WebService(Namespace = "http://tempuri.org/")] [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] [System.ComponentModel.ToolboxItem(false)] public class WebService : System.Web.Services.WebService {     [WebMethod]     public bool UpdateFile(byte[] content, string pathandname)     {         int index = pathandname.LastIndexOf(".");         if (index == 0)         {             return false;         }         else         {             string extended = string.Empty;             if (index + 1 == pathandname.Length)             {                 return false;             }             else             {                 extended = pathandname.Substring(index + 1);                 if (extended == "jpeg" || extended == "gif" || extended == "jpg")                 {                     try                     {                         File.WriteAllBytes(Server.MapPath(pathandname), content);                         return true;                     }                     catch (Exception ex)                     {                         return false;                     }                 }                 else                 {                     return false;                 }             }         }     } }

好了,创建完WebService后,将它布署到服务器上面,然后在Winform中添加对该服务的引用,添加方法如下: 在winform项目的引用-添加服务引用,在打开的对话框的地址栏中添加布署好的WebService地址,点击前往,验证通过后即添加成功了。如下图:

然后,我们就可以在应用程序中使用它了,为了安全,我们在winform中再次验证上传文件只可以为图片。代码如下:

private void button11_Click(object sender, EventArgs e) {     OpenFileDialog fileDialog = new OpenFileDialog();

    if (fileDialog.ShowDialog() == DialogResult.OK)     {         string extension = Path.GetExtension(fileDialog.FileName);         string[] str = new string[] { ".gif", ".jpge", ".jpg" };         if (!str.Contains(extension))         {             MessageBox.Show("仅能上传gif,jpge,jpg格式的图片!");         }         else         {             FileInfo fileInfo = new FileInfo(fileDialog.FileName);             if (fileInfo.Length  > 20480)             {                 MessageBox.Show("上传的图片不能大于20K");             }             else             {                 Stream file = fileDialog.OpenFile();

                byte[] bytes = new byte[file.Length];                 file.Read(bytes, 0, bytes.Length);

                //实例化WebService服务。ServiceReference1是我们在添加引用时设置的命名空间                 ServiceReference1.WebServiceSoapClient WebServiceSoapClient = new AutoPage.ServiceReference1.WebServiceSoapClient();

                DateTime time = DateTime.Now;                 //重命名图片的名称与路径                 string pathandname = "/images/" + time.ToString("yyyyMMddHHmmss") + extension;                 if (WebServiceSoapClient.UpdateFile(bytes, pathandname))                 {                     MessageBox.Show("上传成功!");                     this.textBox1.Text = pathandname;                 }                 else                 {                     MessageBox.Show("上传失败!");                 }             }         }     } }

本文来源于:在WinForm中利用WebService上传图片到服务

原文地址:https://www.cnblogs.com/wyfs/p/2408190.html