本文介绍了如何使用PrintDocument在纸上打印图像的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我的问题是我的代码会打印出彼此重叠的图像。我不知道如何改变x和y位置。打印机应该每行打印3张图像，然后移动到下一行。
My problem is that is that my code prints the images overlapping each other. I do not know how to change the x and y positions. The printer should print 3 images per row and then move to the next row.
private void panel1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
{
for (int serial = 0; serial < SaveBeforePrint.Count; serial++)
{
String intercharacterGap = "0";
String str = '*' + SaveBeforePrint[serial].ToUpper() + '*';
int strLength = str.Length;
for (int i = 0; i < SaveBeforePrint[serial].Length; i++)
{
string barcodestring = SaveBeforePrint[serial].ToUpper();
if (alphabet39.IndexOf(barcodestring[i]) == -1 || barcodestring[i] == '*')
{
e.Graphics.DrawString("INVALID BAR CODE TEXT", Font, Brushes.Red, 10, 10);
return;
}
}
String encodedString = "";
for (int i = 0; i < strLength; i++)
{
if (i > 0)
encodedString += intercharacterGap;
encodedString += coded39Char[alphabet39.IndexOf(str[i])];
}
int encodedStringLength = encodedString.Length;
int widthOfBarCodeString = 0;
double wideToNarrowRatio = 3;
if (align != AlignType.Left)
{
for (int i = 0; i < encodedStringLength; i++)
{
if (encodedString[i] == '1')
widthOfBarCodeString += (int)(wideToNarrowRatio * (int)weight);
else
widthOfBarCodeString += (int)weight;
}
}
int x = 0;
int wid = 0;
int yTop = 0;
SizeF hSize = e.Graphics.MeasureString(headerText, headerFont);
SizeF fSize = e.Graphics.MeasureString(code, footerFont);
int headerX = 0;
int footerX = 0;
int printonpage = 0;
if (align == AlignType.Left)
{
x = leftMargin;
headerX = leftMargin;
footerX = leftMargin;
}
else if (align == AlignType.Center)
{
x = (Width - widthOfBarCodeString) / 2;
headerX = (Width - (int)hSize.Width) / 2;
footerX = (Width - (int)fSize.Width) / 2;
}
else
{
x = Width - widthOfBarCodeString - leftMargin;
headerX = Width - (int)hSize.Width - leftMargin;
footerX = Width - (int)fSize.Width - leftMargin;
}
if (showHeader)
{
yTop = (int)hSize.Height + topMargin;
e.Graphics.DrawString(headerText, headerFont, Brushes.Black, headerX, topMargin);
}
else
{
yTop = topMargin;
}
for (int i = 0; i < encodedStringLength; i++)
{
if (encodedString[i] == '1')
wid = (int)(wideToNarrowRatio * (int)weight);
else
wid = (int)weight;
e.Graphics.FillRectangle(i % 2 == 0 ? Brushes.Black : Brushes.White, x, yTop, wid, height);
x += wid;
}
yTop += height;
if (showFooter)
e.Graphics.DrawString(SaveBeforePrint[serial], footerFont, Brushes.Black, footerX, yTop);
}
}
所需输出：
我得到：
正如您所看到的，最后一位数字是重叠的。我想在前一个旁边绘制它
As you can see the last digit is overlapping. I want to draw it next to the previous one
推荐答案
我观察了代码并发现了问题..在panel1_print中你是没有正确地增加值..
I have observed the code and found the issue.. in panel1_print u are not incrementing the values properly..
我已经做了所需的更改，你将获得一行中的4个条和另一行中的第5个 - 检查附加的图像。
I have made the required changes now u will get the 4 bar in a line and 5th one in another line - check the attached image.
只需用你的新代码替换你的 panel1_Paint 即可找到更改..
我已将它们标记为
just replace ur panel1_Paint with this new code thats it you can find the changes..I have marked them as
//start changes by Deepak
..
..
..
//end changes by Deepak
并且还将两个变量loopValX和loopValY声明为int
and also declare two variables loopValX and loopValY as int
这里是代码..
private void panel1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
{
int loopValX = 0;
int loopValY = -150;
for (int serial = 0; serial < SaveBeforePrint.Count; serial++)
{
String intercharacterGap = "0";
String str = '*' + SaveBeforePrint[serial].ToUpper() + '*';
int strLength = str.Length;
for (int i = 0; i < SaveBeforePrint[serial].Length; i++)
{
string barcodestring = SaveBeforePrint[serial].ToUpper();
if (alphabet39.IndexOf(barcodestring[i]) == -1 || barcodestring[i] == '*')
{
e.Graphics.DrawString("INVALID BAR CODE TEXT", Font, Brushes.Red, 10, 10);
return;
}
}
String encodedString = "";
for (int i = 0; i < strLength; i++)
{
if (i > 0)
encodedString += intercharacterGap;
encodedString += coded39Char[alphabet39.IndexOf(str[i])];
}
int encodedStringLength = encodedString.Length;
int widthOfBarCodeString = 0;
double wideToNarrowRatio = 3;
if (align != AlignType.Left)
{
for (int i = 0; i < encodedStringLength; i++)
{
if (encodedString[i] == '1')
widthOfBarCodeString += (int)(wideToNarrowRatio * (int)weight);
else
widthOfBarCodeString += (int)weight;
}
}
SizeF hSize = e.Graphics.MeasureString(headerText, headerFont);
SizeF fSize = e.Graphics.MeasureString(SaveBeforePrint[serial], footerFont);
int headerX = 0;
int footerX = 0;
if (align == AlignType.Left)
{
x = leftMargin;
headerX = leftMargin;
footerX = leftMargin;
}
else if (align == AlignType.Center)
{
x = (Width - widthOfBarCodeString) / 2;
headerX = (Width - (int)hSize.Width) / 2;
footerX = (Width - (int)fSize.Width) / 2;
}
else
{
x = Width - widthOfBarCodeString - leftMargin;
headerX = Width - (int)hSize.Width - leftMargin;
footerX = Width - (int)fSize.Width - leftMargin;
}
if (showHeader)
{
y = (int)hSize.Height + topMargin;
e.Graphics.DrawString(headerText, headerFont, Brushes.Black, headerX, topMargin);
}
else
{
y = topMargin;
}
//start changes by Deepak
if (serial % 4 == 0)
{
loopValX = 0;
loopValY += 150;
}
else
{
loopValX += 150;
}
x += loopValX;
y += loopValY;
footerX += loopValX;
//end changes by Deepak
for (int i = 0; i < encodedStringLength; i++)
{
if (encodedString[i] == '1')
wid = (int)(wideToNarrowRatio * (int)weight);
else
wid = (int)weight;
e.Graphics.FillRectangle(i % 2 == 0 ? Brushes.Black : Brushes.White, x, y, wid, height);
x += wid;
}
y += height;
if (showFooter)
e.Graphics.DrawString(SaveBeforePrint[serial], footerFont, Brushes.Black, footerX, y);
}
}
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