Question

我正在尝试用c＃.net

编写一个程序

修改具有

的热敏标签打印机.prn文件

   <xpml></page></xpml><xpml><page quantity='25' pitch='35.0 mm'></xpml>N

如何在运行时更改数量属性，使用c＃.net从25到用户输入说50或100或5？所以它将是

<xpml></page></xpml><xpml><page quantity='50' pitch='35.0 mm'></xpml>N

或

<xpml></page></xpml><xpml><page quantity='100' pitch='35.0 mm'></xpml>Nenter code here

或

<xpml></page></xpml><xpml><page quantity='5' pitch='35.0 mm'></xpml>N

完成.prn文件

<xpml><page quantity='0' pitch='35.0 mm'></xpml>I8,A
q843
O
JF
ZT
Q280,25
<xpml></page></xpml><xpml><page quantity='2' pitch='35.0 mm'></xpml>N
b569,70,Q,m2,s5,eL,"12345678"
A686,52,2,4,1,1,N,"12345678"
A823,267,2,4,1,1,N,"Hardware Kit (Egypt)"
b149,70,Q,m2,s5,eL,"12345678"
A266,52,2,4,1,1,N,"12345678"
A403,267,2,4,1,1,N,"Hardware Kit (Egypt)"
P2
<xpml></page></xpml><xpml><end/></xpml>

Answer 1

请尝试以下操作：

            string xml = "<root><xpml><page/></xpml><xpml><page quantity='25' pitch='35.0 mm'/></xpml></root>";

            XElement element = XElement.Parse(xml);
            XElement page = element.Descendants("page").Where(x => x.Attribute("quantity") != null).FirstOrDefault();
            page.SetAttributeValue("quantity", 50);

Answer 2

跟随字符串操作/正则表达式可以解决我的问题但现在我发现没有必要只修改这一行 P命令实际上控制了所需打印的数量

string pattern = @"(quantity=')([0-9]+)";
Regex regex = new Regex(pattern);
string changedvlu = regex.Replace(rowsInTextFile[6], "quantity='" + 
dgvrLabels.Cells["labels2print"].Value.ToString());
string cmdlableqty = rowsInTextFile[6].ToString();
int findpicthpos = cmdlableqty.IndexOf("pitch");
if (findpicthpos>0)
{
   rowsInTextFile[6] = "<xpml></page></xpml><xpml><page quantity ="
            + "\'" + dgvrLabels.Cells["labels2print"].Value + "\' ";
   rowsInTextFile[6] += cmdlableqty.Substring(findpicthpos);
}
else
    MessageBox.Show("Problem in setting label qty:call developer");

修改标签打印机定义.prn文件

2 个答案: