错误:';名称printForm1在当前上下文中不存在';为什么会这样
本文关键字:不存在 为什么 上下文 名称 printForm1 错误 | 更新日期: 2023-09-27 18:29:19
嗨,我从MSDN获得了这段代码。我想不通这个问题,希望你能帮忙。错误位于包含单词printForm1的两行中。我的表单实际上被称为Form1,所以我看不到问题。
[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 btnCreate_Click(object sender, EventArgs e)
{
btncustCont.Visible = false;
btnprintCost.Visible = false;
btnpdfCont.Visible = false;
btnpdfBrochureCont.Visible = false;
btnpaperCont.Visible = false;
btnduplicateCont.Visible = false;
btntypeCont.Visible = false;
btnCalcCost.Visible = false;
btnprintCost.Visible = false;
Application.DoEvents();
CaptureScreen();
printForm1.PrinterSettings.DefaultPageSettings.Landscape = true;
printForm1.Print();
btncustCont.Visible = true;
btnprintCost.Visible = true;
btnpdfCont.Visible = true;
btnpdfBrochureCont.Visible = true;
btnpaperCont.Visible = true;
btnduplicateCont.Visible = true;
btntypeCont.Visible = true;
btnCalcCost.Visible = true;
btnprintCost.Visible = true;
}
看看这篇MSDN文章是如何在类的顶部声明printDocument1的:
private PrintDocument printDocument1 = new PrintDocument();
http://msdn.microsoft.com/en-us/library/vstudio/6he9hz8c(v=vs.100).aspx
您可能想要做同样的事情,只需使用printForm1
我能想到的两种可能性:
如果我没有看错的话,printForm1
是PrintDocument对象的一个实例。对不起,如果我在这里没有给你足够的信用,但你确定printForm1真的在任何地方申报了吗?
否则,请确保您的(codeBehind).cs文件实际上继承了包含此元素的页面。