.net 反射辅助类[源码分享]---希望对大家有所帮助

bek · 发表于 2010-11-30 04:57:30


	using System; using System.Reflection; using System.Data; using System.Drawing; using System.Resources; using System.ComponentModel; using System.Text; using System.IO; namespace Svnhost.Common { /// <summary> /// 反射辅助类 /// </summary> /// <remarks> /// Author: Ridge Wong /// Version: 1.0.0.0 2008-8-7 /// </remarks> public static class ReflectHelper { #region 成员读写 /// <summary> /// 通过数据行填充实体类型 /// </summary> /// <param name="model">实体对象</param> /// <param name="dRow">数据行</param> public static void FillInstanceValue(object model, DataRow dRow) { Type type = model.GetType(); for (int i = 0; i < dRow.Table.Columns.Count; i++) { PropertyInfo property = type.GetProperty(dRow.Table.Columns[i].ColumnName); if (property != null) { property.SetValue(model, dRow[i], null); } } } /// <summary> /// 通过数据只读器填充实体类型 /// </summary> /// <param name="model">实体对象</param> /// <param name="dr">数据只读器</param> public static void FillInstanceValue(object model, IDataReader dr) { Type type = model.GetType(); for (int i = 0; i < dr.FieldCount; i++) { PropertyInfo property = type.GetProperty(dr.GetName(i)); if (property != null) { property.SetValue(model, dr[i], null); } } } /// <summary> /// 获取实体相关属性的值 /// </summary> /// <param name="obj"></param> /// <param name="propertyName"></param> /// <returns></returns> public static object GetInstanceValue(object obj, string propertyName) { object objRet = null; if (!string.IsNullOrEmpty(propertyName)) { PropertyDescriptor descriptor = TypeDescriptor.GetProperties(obj).Find(propertyName, true); if (descriptor != null) { objRet = descriptor.GetValue(obj); } } return objRet; } #endregion #region 方法调用 /// <summary> /// 直接调用内部对象的方法/函数或获取属性(支持重载调用) /// </summary> /// <param name="refType">目标数据类型</param> /// <param name="funName">函数名称，区分大小写。</param> /// <param name="objInitial">如果调用属性，则为相关对象的初始化数据，否则为Null。</param> /// <param name="funParams">函数参数信息</param> /// <returns>运行结果</returns> public static object InvokeMethodOrGetProperty(Type refType, string funName, object[] objInitial, params object[] funParams) { MemberInfo[] mis = refType.GetMember(funName); if (mis.Length < 1) { throw new InvalidProgramException(string.Concat("函数/方法 [", funName, "] 在指定类型(", refType.ToString(), ")中不存在！")); } else { MethodInfo targetMethod = null; StringBuilder pb = new StringBuilder(); foreach (MemberInfo mi in mis) { if (mi.MemberType != MemberTypes.Method) { if (mi.MemberType == MemberTypes.Property) { #region 调用属性方法Get targetMethod = ((PropertyInfo)mi).GetGetMethod(); break; #endregion } else { throw new InvalidProgramException(string.Concat("[", funName, "] 不是有效的函数/属性方法！")); } } else { #region 检查函数参数和数据类型绑定正确的函数到目标调用 bool validParamsLen = false, validParamsType = false; MethodInfo curMethod = (MethodInfo)mi; ParameterInfo[] pis = curMethod.GetParameters(); if (pis.Length == funParams.Length) { validParamsLen = true; pb = new StringBuilder(); bool paramFlag = true; int paramIdx = 0; #region 检查数据类型设置validParamsType是否有效 foreach (ParameterInfo pi in pis) { pb.AppendFormat("Parameter {0}: Type={1}, Name={2}\n", paramIdx, pi.ParameterType, pi.Name); //不对Null和接受Object类型的参数检查 if (funParams[paramIdx] != null && pi.ParameterType != typeof(object) && (pi.ParameterType != funParams[paramIdx].GetType())) { #region 检查类型是否兼容 try { funParams[paramIdx] = Convert.ChangeType(funParams[paramIdx], pi.ParameterType); } catch (Exception) { paramFlag = false; } #endregion //break; } ++paramIdx; } #endregion if (paramFlag == true) { validParamsType = true; } else { continue; } if (validParamsLen && validParamsType) { targetMethod = curMethod; break; } } #endregion } } if (targetMethod != null) { object objReturn = null; #region 兼顾效率和兼容重载函数调用 try { object objInstance = System.Activator.CreateInstance(refType, objInitial); objReturn = targetMethod.Invoke(objInstance, BindingFlags.InvokeMethod, Type.DefaultBinder, funParams, System.Globalization.CultureInfo.InvariantCulture); } catch (Exception) { objReturn = refType.InvokeMember(funName, BindingFlags.InvokeMethod, Type.DefaultBinder, null, funParams); } #endregion return objReturn; } else { throw new InvalidProgramException(string.Concat("函数/方法 [", refType.ToString(), ".", funName, "(args ...) ] 参数长度和数据类型不正确！\n 引用参数信息参考：\n", pb.ToString())); } } } /// <summary> /// 调用相关实体类型的函数方法 /// </summary> /// <param name="refType">实体类型</param> /// <param name="funName">函数名称</param> /// <param name="funParams">函数参数列表</param> /// <returns>调用该函数之后的结果</returns> public static object InvokeFunction(Type refType, string funName, params object[] funParams) { return InvokeMethodOrGetProperty(refType, funName, null, funParams); } #endregion #region 资源获取 /// <summary> /// 获取程序集资源的位图资源 /// </summary> /// <param name="assemblyType">程序集中的某一对象类型</param> /// <param name="resourceHolder">资源的根名称。例如，名为“MyResource.en-US.resources”的资源文件的根名称为“MyResource”。</param> /// <param name="imageName">资源项名称</param> public static Bitmap LoadBitmap(Type assemblyType, string resourceHolder, string imageName) { Assembly thisAssembly = Assembly.GetAssembly(assemblyType); ResourceManager rm = new ResourceManager(resourceHolder, thisAssembly); return (Bitmap)rm.GetObject(imageName); } /// <summary> /// 获取程序集资源的文本资源 /// </summary> /// <param name="assemblyType">程序集中的某一对象类型</param> /// <param name="resName">资源项名称</param> /// <param name="resourceHolder">资源的根名称。例如，名为“MyResource.en-US.resources”的资源文件的根名称为“MyResource”。</param> public static string GetStringRes(Type assemblyType, string resName, string resourceHolder) { Assembly thisAssembly = Assembly.GetAssembly(assemblyType); ResourceManager rm = new ResourceManager(resourceHolder, thisAssembly); return rm.GetString(resName); } /// <summary> /// 获取程序集嵌入资源的文本形式 /// </summary> /// <param name="assemblyType">程序集中的某一对象类型</param> /// <param name="charset">字符集编码</param> /// <param name="ResName">嵌入资源相对路径</param> /// <returns>如没找到该资源则返回空字符</returns> public static string GetManifestString(Type assemblyType, string charset, string ResName) { Assembly asm = Assembly.GetAssembly(assemblyType); Stream st = asm.GetManifestResourceStream(string.Concat(assemblyType.Namespace, ".", ResName.Replace("/", "."))); if (st == null) { return ""; } int iLen = (int)st.Length; byte[] bytes = new byte[iLen]; st.Read(bytes, 0, iLen); return (bytes != null) ? Encoding.GetEncoding(charset).GetString(bytes) : ""; } #endregion } } 复制代码 PS:大家觉得好顶顶。鄙视看帖不回的。