修改上传图片文件大小代码,CSharp代码库,德仔网

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【CSharp】修改上传图片文件大小

作者:Dezai.CN / 发布于2012/11/15/ 595

// <param name="fileFoldUrl">文件夹url</param>   
/// <param name="fileName">文件名</param>   
/// <param name="filePath">文件路径，带文件名</param>   
/// <param name="_width">分辨率的宽</param>   
/// <param name="_height">分辨率的高</param>   
public void update_picture(string fileFoldUrl, string fileName, string filePath, int _width, int _height)   
{   
    byte[] zp = this.load_pictMemory(filePath);   
  
    MemoryStream ms = new MemoryStream(zp);   
  
    System.Drawing.Image img = System.Drawing.Image.FromStream(ms);   
  
    Bitmap btp = new Bitmap(img, _width, _height);   
  
    DirectoryInfo dti = new DirectoryInfo(fileFoldUrl);   
  
    FileInfo[] fis = dti.GetFiles();   
  
    string fileUrl = fileFoldUrl + fileName;   
  
    btp.Save(fileUrl);   
}   
  
/// <summary>   
/// 获取指定文件流的字节大小   
/// </summary>   
/// <param name="filePath">文件路径</param>   
/// <returns>byte[]</returns>   
public byte[] load_pictMemory(string filePath)   
{   
    byte[] pictData = null;   
  
    FileInfo fi = new FileInfo (filePath);   
  
    if (fi.Exists)   
    {   
        pictData = new byte[fi.Length];   
  
        FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.ReadWrite);   
  
        BinaryReader br = new BinaryReader(fs);   
  
        br.Read(pictData, 0, Convert.ToInt32(fi.Length));   
  
        fs.Dispose();   
    }   
    else  
    {   
        HttpContext.Current.Response.Write("<script language='javascript'>alert('没有找到你所指定的图片')</script>");   
    }   
    return pictData;   
}

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　修改上传图片　

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