在SQL2008Clr 存储过程中动态调用WebService
我写了一上存储过程,很简单,
就是传入一个服务URL
通过个URL动态调用远程WebService
动态调用的类是在网上找的,一大堆,在C#程序中是没问题的
但同样的方法在CLR存储过程中无效,具体如下:
/// < summary>
/// 动态调用web服务
/// < /summary>
/// < param name="url">WSDL服务地址< /param>
/// < param name="classname">类名< /param>
/// < param name="methodname">方法名< /param>
/// < param name="args">参数< /param>
/// < returns>< /returns>
public static object InvokeWebService(string url, string classname, string methodname, object[] args)
{
string @namespace = "EnterpriseServerBase.WebService.DynamicWebCalling";
if ((classname == null) || (classname == ""))
{
classname = WSHelper.GetWsClassName(url);
}
try
{
//获取WSDL
WebClient wc = new WebClient();
Uri uri = new Uri(url + "?WSDL");
Stream stream = wc.OpenRead(uri);
// 2. 创建和格式化 WSDL 文档。
ServiceDescription sd = ServiceDescription.Read(stream);
ServiceDescriptionImporter sdi = new ServiceDescriptionImporter();
sdi.AddServiceDescription(sd, "", "");
CodeNamespace cn = new CodeNamespace(@namespace);
//生成客户端代理类代码
CodeCompileUnit ccu = new CodeCompileUnit();
ccu.Namespaces.Add(cn);
sdi.Import(cn, ccu);
CSharpCodeProvider icc = new CSharpCodeProvider();
//设定编译参数
CompilerParameters cplist = new CompilerParameters();
cplist.GenerateExecutable = false;
cplist.GenerateInMemory = true;
cplist.ReferencedAssemblies.Add("System.dll");
cplist.ReferencedAssemblies.Add("System.XML.dll");
cplist.ReferencedAssemblies.Add("System.Web.Services.dll");
cplist.ReferencedAssemblies.Add("System.Data.dll");
//编译代理类
CompilerResults cr = icc.CompileAssemblyFromDom(cplist, ccu);
if (true == cr.Errors.HasErrors)
{
System.Text.StringBuilder sb = new System.Text.StringBuilder();
foreach (System.CodeDom.Compiler.CompilerError ce in cr.Errors)
{
sb.Append(ce.ToString());
sb.Append(System.Environment.NewLine);
}
throw new Exception(sb.ToString());
}
//生成代理实例,并调用方法
System.Reflection.Assembly assembly = cr.CompiledAssembly;
Type t = assembly.GetType(@namespace + "." + classname, true, true);
object obj = Activator.CreateInstance(t);
System.Reflection.MethodInfo mi = t.GetMethod(methodname);
return mi.Invoke(obj, args);
}
catch (Exception ex)
{
throw new Exception(ex.InnerException.Message, new Exception(ex.InnerException.StackTrace));
}
}
错误就发生在上面红字的位置,具体错误提示就是“请求失败” SQL
[解决办法]
你这个应该是安全问题造成 ,参考一下下面的
http://msdn.microsoft.com/en-us/library/ms345106.aspx
另外,你是怎么确定 是从 “ServiceDescriptionImporter sdi = new ServiceDescriptionImporter();” 那行抛出的异常?
[解决办法]
换个思路吧
提供个地址:
http://blog.csdn.net/fengying0529/article/details/5213847