PB调用C#编写的DLL

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C#以其简单易用,功能强大深受大家喜爱.PowerBuilder作为C/S的MIS开发工具,十分简单灵活,开发时间短,开发及维护成本低,一直是中小企业信息管理系统的首选开发工具.但是PB的局限性限制了它进一步的发展,这个就不多说了,玩PB的朋友都清楚.PB如何调用C#写的DLL,这个兴趣一上来,就忍不住要解决它.经过多方查找资料加上自己写代码测试,算是解决这个难题.下面列出开发步骤及各种设置选项(开发工具VS2008SP1+PB9.0-8836)

首先我们打开VS2008,新建一个项目,如图

接着我们双击解决方案下面的属性文件夹[Properties],系统将打开类型的属性设置窗口,选择[应用程序]

点击程序集信息按钮,弹出信息窗口,选中[使程序集COM可见],如图

接下来选择[生成]标签 ,选中[为COM互操作注册]

选择[签名]标签,选中[为程序集签名]-->[选择强名称密钥文件]-->[新建],输入你的密钥名称,去掉[使用密码保护密钥文件],如图

OK,到这里配置完成,下面给出代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web;
using System.Security.Cryptography;
using System.IO;
using System.Web.SessionState;
using System.Runtime.InteropServices;

namespace encry
{
[Guid("FF6B4D57-F34E-49ec-9A3B-D0A17B59F78A")]
public interface IEncryption
{
[DispId(1)]
string EncryptString(string encryptString, string encryptKey);
[DispId(2)]
string DecryptString(string decryptString, string decryptKey);
[DispId(3)]
string md5(string str, int code);
}

[Guid("531D2D13-11DE-41a8-A788-CB51B5642CCE"), ClassInterface(ClassInterfaceType.None), ComSourceInterfaces(typeof(IEncryption))]
public class encryption : IEncryption
{
#region "3des加密字符串"
/// <summary>
/// DES加密字符串
/// </summary>
/// <param name="encryptString">待加密的字符串</param>
/// <param name="encryptKey">加密密钥,要求为8位</param>
/// <returns>加密成功返回加密后的字符串，失败返回源串</returns>
public string EncryptString(string encryptString, string encryptKey)
{
try
{
byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));
byte[] rgbIV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();
MemoryStream mStream = new MemoryStream();
CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
return Convert.ToBase64String(mStream.ToArray());
}
catch
{
return encryptString;
}
}
#endregion

#region "3des解密字符串"
/// <summary>
/// DES解密字符串
/// </summary>
/// <param name="decryptString">待解密的字符串</param>
/// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param>
/// <returns>解密成功返回解密后的字符串，失败返源串</returns>
public string DecryptString(string decryptString, string decryptKey)
{
try
{
byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey.Substring(0, 8));
byte[] rgbIV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
byte[] inputByteArray = Convert.FromBase64String(decryptString);
DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();
MemoryStream mStream = new MemoryStream();
CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
return Encoding.UTF8.GetString(mStream.ToArray());
}
catch
{
return decryptString;
}
}

#endregion

#region "MD5加密"
/// <summary>
/// MD5加密
/// </summary>
/// <param name="str">加密字符</param>
/// <param name="code">加密位数16/32</param>
/// <returns></returns>
public string md5(string str, int code)
{
string strEncrypt = string.Empty;
if (code == 16)
{
strEncrypt = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(str, "MD5").Substring(8, 16);
}

if (code == 32)
{
strEncrypt = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(str, "MD5");
}

return strEncrypt;
}
#endregion
}
}

生成一下,在你的程序目录下面bin文件夹下有一个debug文件夹,生成的DLL就在里面.这个时候pb还不能调用这个DLL.

在这里说明一下,代码里面的GUID是怎样生成的.

打开你的VS2008命令提示,如图