将整个DataGridView保存为图像 [英] Save whole of DataGridView as an Image

问题描述

我需要将整个DataGridView保存为图像.
我在网上看到过一些帖子，但对我不起作用.
到目前为止，我已经尝试了以下两个链接:

I need to save the whole of a DataGridView as an Image.
I have seen some post online but it did not work for me.
So far, I've tried these 2 links:

将图像保存在文件夹中.

我的意图是，一旦按下按钮，DataGridView将被转换为图像，并将其自动保存到桌面.

What I intend is that once a Button is pressed, the DataGridView will be converted into an Image and it will be automatically saved to the Desktop.

我使用的代码会产生错误:

The code I'm using generates an error:

GDI +中发生一般错误

A generic error occurred in GDI+

     private void button1_Click(object sender, EventArgs e) 
    {
        //Resize DataGridView to full height.
        int height = dataGridView1.Height;
        dataGridView1.Height = dataGridView1.RowCount * dataGridView1.RowTemplate.Height;

        //Create a Bitmap and draw the DataGridView on it.
        Bitmap bitmap = new Bitmap(this.dataGridView1.Width, this.dataGridView1.Height);
        dataGridView1.DrawToBitmap(bitmap, new Rectangle(0, 0, this.dataGridView1.Width, this.dataGridView1.Height));

        //Resize DataGridView back to original height.
        dataGridView1.Height = height;

        //Save the Bitmap to folder.

       bitmap.Save(@"C:\\Desktop\\datagrid.jpg");
    }

希望获得一些帮助.谢谢！

Hope to get some help. Thanks!

推荐答案

您需要修复代码的多个部分:

You need to fix more than one section of you code:

1. bitmap.Save(@"C:\\ Desktop \\ datagrid.jpg"); .此路径字符串应为:
   @"C:\ Users \ SomeUser \ Desktop \ datagrid.jpg" 或
   "C:\\ Users \\ SomeUser \\ Desktop\\ datagrid.jpg" .参见第6点.
2. 计算DataGridView高度时，不包括网格标题.
   
3. 创建 Bitmap 对象时，必须将该对象与您创建的任何其他一次性对象一样处理.您可以使用使用块.
4. Bitmap.Save([Path])，而不指定 Environment.SpecialFolder桌面.

1. bitmap.Save(@"C:\\Desktop\\datagrid.jpg");. This path string should be:
   @"C:\Users\SomeUser\Desktop\datagrid.jpg" or
   "C:\\Users\\SomeUser\\Desktop\\datagrid.jpg". See point 6.
2. When calculating the DataGridView height, you're not including the grid Header.
   
3. When creating a Bitmap object, that object must be disposed of, as any other disposable object you create. You can use the Bitmap.Dispose() method or enclose your object in a Using block.
4. Bitmap.Save([Path]), without specifying an ImageFormat, creates a PNG image. The file extension you insert in the Path string is not considered. At this time, you're creating a file with a .jpg extension when it's actually a .png file.
   
5. You should use the Png format, not Jpeg when saving this kind of bitmap. Its loss-less compression is more adeguate: it will preserve the image colors and improve the overall quality.
6. The Path to the current user Desktop should not be hard-coded. This path is returned by Environment.SpecialFolder.Desktop.

您可以按以下方式修改代码:

You could modify your code as follows:

using System.IO;

private void button1_Click(object sender, EventArgs e)
{
    int DGVOriginalHeight = dataGridView1.Height;
    dataGridView1.Height = (dataGridView1.RowCount * dataGridView1.RowTemplate.Height) + 
                            dataGridView1.ColumnHeadersHeight;

    using (Bitmap bitmap = new Bitmap(this.dataGridView1.Width, this.dataGridView1.Height))
    {
        dataGridView1.DrawToBitmap(bitmap, new Rectangle(Point.Empty, this.dataGridView1.Size));
        string DesktopFolder = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);
        bitmap.Save(Path.Combine(DesktopFolder, "datagridview1.png"), ImageFormat.Png);
    }
    dataGridView1.Height = DGVOriginalHeight;
}

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