C# bartender封装dll异常

bartender提供C#的SDK，使用C#引用SDK可以正常打印标签，那么，能否使用C#将bartender打印功能二次封装为dll，供其他开发语言调用呢？

实践出真知，简单写了一个使用bartender打印的dll，以下是dll的源码：

using System;
using System.Runtime.InteropServices;
using Seagull.BarTender.Print;

namespace bDll
{
public interface ILabelPrint
{
void Create();
void Destroy();
int PrintLabel();
}

public class LabelPrint: ILabelPrint
{
static Engine engine = null; // The BarTender Print Engine
static LabelFormatDocument format = null; // The currently open Format
public void Create()
{
if (engine == null)
{
engine = new Engine(true);
}
}

public void Destroy()
{
if (engine != null)
{
engine.Stop(SaveOptions.DoNotSaveChanges);
engine = null;
}
}

public int PrintLabel()
{
string labelpath = @”d:\1.btw”;
string printdate = “P1&111^P2&222″;
string AllLabelName = “”;
int i;
int len;
string sSubName = “”;
string sSubValue = “”;
string printer = “CutePDF Writer”;
int is_ok = 1;

format = engine.Documents.Open(labelpath);
try
{
string[] sSubstrings = printdate.Split(‘^’);
for (i = 0; i < format.SubStrings.Count; i++)
{
AllLabelName += format.SubStrings[i].Name + “$”;
}
for (i = 0; i < sSubstrings.Length; i++)
{
len = sSubstrings[i].IndexOf(“&”);
sSubName = sSubstrings[i].Substring(0, len);
if (AllLabelName.IndexOf(sSubName) != -1)
{
sSubValue = sSubstrings[i].Substring(len + 1, sSubstrings[i].Length – len – 1);
format.SubStrings[sSubName].Value = sSubValue;
}
}
format.PrintSetup.PrinterName = printer;//打印机名
format.PrintSetup.IdenticalCopiesOfLabel = 1;
format.Print();
}
catch
{
is_ok = 0;
}
finally
{
format.Close(SaveOptions.DoNotSaveChanges);
}
return is_ok;
}
}
}

测试了下，发现若是放在C#应用程序中调用，能正常打印，而使用delphi调用的话，会卡在打印标签模板这行代码。

format = engine.Documents.Open(labelpath);

目前不知原因，后面会查下资料，看能否实现，若是成功会告诉大家，若是此路不通，此事至此为止。