保存图像 - 路径问题 [英] Saving image - path problem

问题描述

public void SaveJpeg(string path, Image image, int quality)
{
    //ensure the quality is within the correct range
    if ((quality < 0) || (quality > 100))
    {
        //create the error message
        string error = string.Format("Jpeg image quality must be between 0 and 100, with 100 being the highest quality.  A value of {0} was specified.", quality);
        //throw a helpful exception
        throw new ArgumentOutOfRangeException(error);
    }

    //create an encoder parameter for the image quality
    EncoderParameter qualityParam = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, quality);
    //get the jpeg codec
    ImageCodecInfo jpegCodec = GetEncoderInfo("image/jpeg");

    //create a collection of all parameters that we will pass to the encoder
    EncoderParameters encoderParams = new EncoderParameters(1);
    //set the quality parameter for the codec
    encoderParams.Param[0] = qualityParam;
    //save the image using the codec and the parameters
    image.Save(path, jpegCodec, encoderParams);
}

这一行实际上是一个问题： image.Save （path，jpegCodec，encoderParams）;

This line is actually a problem: image.Save(path, jpegCodec, encoderParams);

如果我设置path = C：/PathToMyProject/imagename.jpg 然后保存工作，但如果我使用相对路径然后我得到错误

If I set path = "C:/PathToMyProject/imagename.jpg" then saving works, but if I use relative path then I get error

GDI +中发生一般错误。

A generic error occurred in GDI+.

我也尝试过： Server.MapPath（路径）但没有帮助。

I also tried: Server.MapPath(path) but no help.

我的问题是如何设置上传文件夹的相对路径？

My question is how to set relative path to upload folder?

推荐答案

将指定的虚拟路径映射到物理路径。

Maps the specified virtual path to a physical path.

Path.Combine（Server.MapPath（〜/ images / store） ，imageName）;

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