c# - 无法使用变量名保存位图图像

Question

我是 C# 的新手，我试图在单击按钮时保存位图图像。为此，我正在使用 visual studio 2010。我可以通过传递一个特定的字符串作为文件名来保存我的图像。这是我保存图像的代码:-

    private void button1_Click(object sender, EventArgs e)
    { 

        bmpScreenshot = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height, PixelFormat.Format32bppArgb);
        gfxScreenshot = Graphics.FromImage(bmpScreenshot);
        gfxScreenshot.CopyFromScreen(Screen.PrimaryScreen.Bounds.X, Screen.PrimaryScreen.Bounds.Y, 0, 0, Screen.PrimaryScreen.Bounds.Size, CopyPixelOperation.SourceCopy);
        bmpScreenshot.Save("img.jpg", ImageFormat.Jpeg);
    }

但我想保存这张名为图像拍摄时间的图像。所以我在我的代码中添加了这个:-

    private void button1_Click(object sender, EventArgs e)
    { 
        string time = DateTime.Now.ToString("hh:mm:ss");
        string img = time + ".jpg";
        bmpScreenshot = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height, PixelFormat.Format32bppArgb);
        gfxScreenshot = Graphics.FromImage(bmpScreenshot);
        gfxScreenshot.CopyFromScreen(Screen.PrimaryScreen.Bounds.X, Screen.PrimaryScreen.Bounds.Y, 0, 0, Screen.PrimaryScreen.Bounds.Size, CopyPixelOperation.SourceCopy);
        bmpScreenshot.Save(img, ImageFormat.Jpeg);

    }

此代码构建正常，但当我单击我的按钮时，出现此异常:-

NotSupportedException was handled

谁能告诉我如何用名称作为时间码保存我的图像。

Answer 1

文件名不应包含:。尝试将其更改为下划线或简单地删除它:

private void button1_Click(object sender, EventArgs e)
{ 
    string time = DateTime.Now.ToString("HHmmss");
    string img = time + ".jpg";
    bmpScreenshot = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height, PixelFormat.Format32bppArgb);
    gfxScreenshot = Graphics.FromImage(bmpScreenshot);
    gfxScreenshot.CopyFromScreen(Screen.PrimaryScreen.Bounds.X, Screen.PrimaryScreen.Bounds.Y, 0, 0, Screen.PrimaryScreen.Bounds.Size, CopyPixelOperation.SourceCopy);
    bmpScreenshot.Save(img, ImageFormat.Jpeg);

}