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我正在尝试编写一种比较两个对象的通用方法(我故意要引入两种不同的类型.第二种具有与第一种相同的属性.第一种具有更多的属性.)
我想确保这些属性具有相同的值.以下代码适用于我在对象中拥有的大多数属性,但有时会抛出:
“Object Does Not Match Target Type”
…错误
var valFirst = prop.GetValue(manuallyCreated,null)as IComparable;
public static bool SameCompare<T, T2>(T manuallyCreated, T2 generated){
var propertiesForGenerated = generated.GetType().GetProperties();
int compareValue = 0;
foreach (var prop in propertiesForGenerated) {
var valFirst = prop.GetValue(manuallyCreated, null) as IComparable;
var valSecond = prop.GetValue(generated, null) as IComparable;
if (valFirst == null && valSecond == null)
continue;
else if (valFirst == null) {
System.Diagnostics.Debug.WriteLine(prop + "s are not equal");
return false;
}
else if (valSecond == null) {
System.Diagnostics.Debug.WriteLine(prop + "s are not equal");
return false;
}
else if (prop.PropertyType == typeof(System.DateTime)) {
TimeSpan timeDiff = (DateTime)valFirst - (DateTime)valSecond;
if (timeDiff.Seconds != 0) {
System.Diagnostics.Debug.WriteLine(prop + "s are not equal");
return false;
}
}
else
compareValue = valFirst.CompareTo(valSecond);
if (compareValue != 0) {
System.Diagnostics.Debug.WriteLine(prop + "s are not equal");
return false;
}
}
System.Diagnostics.Debug.WriteLine("All values are equal");
return true;
}
最佳答案
.NET中在类型上定义的每个属性都不同,即使它们具有相同的名称.您必须这样做:
foreach (var prop in propertiesForGenerated)
{
var otherProp = typeof(T).GetProperty(prop.Name);
var valFirst = otherProp.GetValue(manuallyCreated, null) as IComparable;
var valSecond = prop.GetValue(generated, null) as IComparable;
...
当然,这没有考虑到T上定义的某些属性可能在T2上不存在,反之亦然.
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转载注明原文:C#-GetValue-对象与目标类型不匹配 - 乐贴网