爲什麼我的圖像不能打印到PrintDocument？

Question

我有「C：//」中名稱爲「1.bmp」，「2.bmp」，「3.bmp」等位圖，我試圖打印這些圖像，但打印文檔是空的圖像是在正確的路徑）

這裏是我的代碼：

private void button3_Click_1(object sender, EventArgs e) 
{ 
    PrintDocument pd = new PrintDocument(); 
    for (int indice = 0; indice < nPaginasPDF + 1; indice++) 
    { 
     pd.PrintPage += new PrintPageEventHandler(Print_Page); 
    } 
    PrintPreviewDialog dlg = new PrintPreviewDialog(); 

    dlg.Document = pd; 
    dlg.ShowDialog(); 
    pd.Print(); 
}  

private void Print_Page(object o, PrintPageEventArgs e) 
{ 
    nPaginasImpressas++; 
    System.Drawing.Image i = System.Drawing.Image.FromFile("C:\\" + nPaginasImpressas + ".bmp"); 
    Point p = new Point(891, 1350); 
    e.Graphics.DrawImage(i, p); 
} 

Answer 1

確定，因此通過頁面的打印利用了PrintPageEventArgs類，並多次不重視該事件的過程。考慮以下代碼：

private void button3_Click_1(object sender, EventArgs e) 
{ 
    PrintDocument pd = new PrintDocument(); 
    pd.PrintPage += new PrintPageEventHandler(Print_Page); 
    PrintPreviewDialog dlg = new PrintPreviewDialog(); 

    dlg.Document = pd; 
    dlg.ShowDialog(); 
    pd.Print(); 
}  

private void Print_Page(object o, PrintPageEventArgs e) 
{ 
    nPaginasImpressas++; 
    System.Drawing.Image i = System.Drawing.Image.FromFile("C:\\" + nPaginasImpressas + ".bmp"); 
    Point p = new Point(0, 0); 
    e.Graphics.DrawImage(i, p); 

    e.HasMorePages = File.Exists("C:\\" + (nPaginasImpressas + 1) + ".bmp"); 
} 

此代碼應允許您打印多個頁面。但請注意對Point的更改 - 這對我來說是相當可疑的，然後是HasMorePages的槓桿作用。