如何在C＃.NET中保存和打印包含许多页面的Windows窗体。 [英] How to save and print a windows form that has many pages in C#.NET.
问题描述
我有一个有4页的Windows表单。我的表单包含带有值和标签的文本框。我并尝试保存表单并打印出来。我只能打印第一页。如何打印其他页面？当我尝试保存它时，我得到了空白页面。我使用的代码如下：谢谢。
我的尝试：
[System.Runtime.InteropServices.DllImport（gdi32.dll）]
public static extern long BitBlt（IntPtr hdcDest，int nXDest，int nYDest，int nWidth，int nHeight，IntPtr hdcSrc，int nXSrc，int nYSrc，int dwRop）;
private Bitmap memoryImage;
private void CaptureScreen（）
{
Graphics mygraphics = this.CreateGraphics（）;
Size s = this.Size;
memoryImage = new Bitmap（s .Width，s.Height，mygraphics）;
图形memoryGraphics = Graphics.FromImage（memoryImage）;
IntPtr dc1 = mygraphics.GetHdc（）;
IntPtr dc2 = memoryGraphics.GetHdc（）;
BitBlt（dc2,0,0，this.ClientRectangle.Width，this.ClientRectangle.Height，dc1,0,0,13368376）;
mygrap hics.ReleaseHdc（dc1）;
memoryGraphics.ReleaseHdc（dc2）;
}
private void printDocument1_PrintPage （System.Object sender，System.Drawing.Printing.PrintPageEventArgs e）
{
e.Graphics.DrawImage（memoryImage，0,0）;
}
private void printToolStripButton_Click（object sender，EventArgs e）
{
CaptureScreen（） ;
printDocument1.Print（）;
}
private void saveToolStripButton_Click（object sender，EventArgs e）
{
Stream myStream;
saveFileDialog1.Filter =所有文件（*。*）| * 。*;
saveFileDialog1.FilterIndex = 2;
saveFileDialog1.RestoreDirectory = true;
if（ saveFileDialog1.ShowDia log（）== DialogResult.OK）
{
if（（myStream = saveFileDialog1.OpenFile（））！= null）
{
使用（var writer = new StreamWriter（myStream））
{
CaptureScreen（）;
writer。 WriteLine（）;
}
myStream.Close（）;
}
}
}
I have a Windows form that has 4 pages. My form has text boxes with values, and labels. I and trying to save the form and print it. I am able to print only the first page. How can I print the other pages? When I try to save it, I get the blank page. The code I am using is below: Thanks.
What I have tried:
[System.Runtime.InteropServices.DllImport("gdi32.dll")]
public static extern long BitBlt(IntPtr hdcDest, int nXDest, int nYDest, int nWidth, int nHeight, IntPtr hdcSrc, int nXSrc, int nYSrc, int dwRop);
private Bitmap memoryImage;
private void CaptureScreen()
{
Graphics mygraphics = this.CreateGraphics();
Size s = this.Size;
memoryImage = new Bitmap(s.Width, s.Height, mygraphics);
Graphics memoryGraphics = Graphics.FromImage(memoryImage);
IntPtr dc1 = mygraphics.GetHdc();
IntPtr dc2 = memoryGraphics.GetHdc();
BitBlt(dc2, 0, 0, this.ClientRectangle.Width, this.ClientRectangle.Height, dc1, 0, 0, 13369376);
mygraphics.ReleaseHdc(dc1);
memoryGraphics.ReleaseHdc(dc2);
}
private void printDocument1_PrintPage(System.Object sender, System.Drawing.Printing.PrintPageEventArgs e)
{
e.Graphics.DrawImage(memoryImage, 0, 0);
}
private void printToolStripButton_Click(object sender, EventArgs e)
{
CaptureScreen();
printDocument1.Print();
}
private void saveToolStripButton_Click(object sender, EventArgs e)
{
Stream myStream;
saveFileDialog1.Filter = "All files (*.*)|*.*";
saveFileDialog1.FilterIndex = 2;
saveFileDialog1.RestoreDirectory = true;
if (saveFileDialog1.ShowDialog() == DialogResult.OK)
{
if ((myStream = saveFileDialog1.OpenFile()) != null)
{
using (var writer = new StreamWriter(myStream))
{
CaptureScreen();
writer.WriteLine();
}
myStream.Close();
}
}
}
推荐答案
不要这样做！
而不是拍摄屏幕图像，打印表格的内容 - 它在各种控件中显示的数据 - 直接显示在PrintDocument上。
PrintDocument Class（System.Drawing.Printing） [ ^ ]包含一个基本示例。
Don't do it like that!
Instead of taking a screen image, print the content of the form - the data it is displaying in the various controls - directly onto your PrintDocument.
PrintDocument Class (System.Drawing.Printing)[^] includes a basic example.
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