[英]c# Generic List
我使用通用列表將不同實體的數據填充到列表集中,如下所示:
List<Foo> foos ..
List<Bar> bars ..
我需要將這些列表寫入文件,我確實有一個util方法來使用反射來獲取屬性等的值。
我想要做的是:使用一種方法將這些內容寫入文件,例如:
void writeToFile(a generic list)
{
//Which i will write to file here.
}
我怎樣才能做到這一點?
我希望能夠打電話給:
writeToFile(bars);
writeToFile(foos);
void writeToFile<T>(List<T> list)
{
// Do the writing
}
您可以使用泛型來允許調用方指定列表包含的預期類型。
void writeToFile<T>(IList<T> list)
{
...
}
大概像...
private void WriteToFile<T>(
IEnumerable<T> elementsToWrite,
Func<T, string> convertElementToString) {
foreach (var element in elementsToWrite)
{
var stringRepresentation = convertElementToString(element);
// do whatever other list-stuff you need to do
}
}
// called like so...
WriteToFile(listOfFoo, foo => foo.FP1 + ", " + foo.FP2 + " = " foo.FP3);
WriteToFile(listOfBar, bar => bar.BP1 +"/"+ bar.BP2 + "[@x='" + bar.BP3 + "']");
...或者您可以嘗試類似...
private void WriteToFile<T>(
IEnumerable<T> elementsToWrite,
Action<T, TextWriter> writeElement) {
var writer = ...;
foreach (var element in elementsToWrite)
{
// do whatever you do before you write an element
writeElement(element, writer);
// do whatever you do after you write an element
}
}
// called like so...
WriteToFile(listOfFoo, (foo, writer) =>
writer.Write("{0}, {1} = {2}", foo.FP1, foo.FP2, foo.FP3));
WriteToFile(listOfBar, (bar, writer) =>
writer.Write("{0}/{1}[@x='{2}']", bar.BP1, bar.BP2, bar.BP3));
...或任何...您有主意。
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