C# 如何调整图像大小

我有点健忘 已经做了很多次了，但是找不到上次做的代码 如何调整多张图片的大小

我确实喜欢这个

Guid imageName;
imageName = Guid.NewGuid();
string storePath = Server.MapPath("~") + "/MultipleUpload";
if (!Directory.Exists(storePath))
    Directory.CreateDirectory(storePath);
hif.PostedFile.SaveAs(storePath + "/" + Path.GetFileName(hif.PostedFile.FileName));

string tempPath = "Gallery";
string imgPath = "Galleryt";
string savePath = Path.Combine(Request.PhysicalApplicationPath, tempPath);
string TempImagesPath = Path.Combine(savePath, imageName + hif.PostedFile.FileName);
string imgSavePath = Path.Combine(Request.PhysicalApplicationPath, imgPath);
string ProductImageNormal = Path.Combine(imgSavePath, "t__" + imageName + hif.PostedFile.FileName);
string extension = Path.GetExtension(hif.PostedFile.FileName);
switch (extension.ToLower())
    {
        case ".png": goto case "Upload";
        case ".gif": goto case "Upload";
        case ".jpg": goto case "Upload";
        case "Upload": hif.PostedFile.SaveAs(TempImagesPath);
            ImageTools.GenerateThumbnail(TempImagesPath, ProductImageNormal, 250, 350, true, "heigh");
            Label1.Text = "";
            break;
    }

我发现自己 不过还是谢谢你的关注

但现在我有另一个问题 我不会将原始文件保留在页面上，它应该在完成调整大小后再次删除 如果我在代码中用

File.Delete(Server.MapPath("~/Gallery/" + imageName + hif.PostedFile.FileName));

所以它说它不能删除该文件，因为它正被另一个进程使用

                        string storePath = Server.MapPath("~") + "/MultipleUpload";
                        if (!Directory.Exists(storePath))
                            Directory.CreateDirectory(storePath);

                        string tempPath = "Galleryt";
                        string imgPath = "Gallery";
                        string savePath = Path.Combine(Request.PhysicalApplicationPath, tempPath);
                        string imgSavePath = Path.Combine(Request.PhysicalApplicationPath, imgPath);
                        string imgSavePath2 = Path.Combine(Request.PhysicalApplicationPath, imgPath);
                        string ProductImageNormal = Path.Combine(imgSavePath, imageName + hif.PostedFile.FileName);
                        string ProductImagetemp = Path.Combine(savePath, "t__" + imageName + hif.PostedFile.FileName);
                        string ProductImagetemp2 = Path.Combine(imgSavePath2, "b__" + imageName + hif.PostedFile.FileName);
                        string extension = Path.GetExtension(hif.PostedFile.FileName);

                        switch (extension.ToLower())
                        {
                            case ".png": goto case "Upload";
                            case ".gif": goto case "Upload";
                            case ".jpg": goto case "Upload";
                            case "Upload": hif.PostedFile.SaveAs(ProductImageNormal);
                                ImageTools.GenerateThumbnail(ProductImageNormal, ProductImagetemp, 600, 600, true, "heigh");
                                ImageTools.GenerateThumbnail(ProductImageNormal, ProductImagetemp2, 250, 350, true, "heigh");

                                Label1.Text = "";
                                break;
                            default:
                                Label1.Text = "Status: Denne filtype er ikke tilladt";
                                return;

                        }

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“e”标签的用途是什么？我已经试过设置它了。我认为这有点像ImageTools.GenerateThumbnail（TempImagesPath，TempImagesPath，250350，真的，“嗨”）；但是Andrew所说的Didnt Work将有助于清理代码，因为大小调整问题与上载过程无关。