我想用方法創建兩個串列，第一個方法創建一個新串列，第二個修改第一個串列但回傳一個新串列。例如，第一個串列有200個專案，在第二個方法中添加和洗掉一些專案后，回傳的串列有120個專案。但是第二種方法實際上是修改第一個串列（現在兩個串列都有 120 項）。我究竟做錯了什么？。PD。我在學
protected void Page_Load(object sender, EventArgs e)
{
List<string> firstList = OEEClass.GetCompleteListDocument(DateTime.Today, "BZX"); // Let say it has 200 items
List<string> modifiedList = OEEClass.ModifyList(firstList); // The returned list has less items
}
public class OEEClass
{
public static List<string> GetCompleteListDocument(DateTime Fecha, string noMaquina)
{
var rawDoc = new HtmlDocument();
var tempList = new List<string>();
string url = @"C:/www/WPCS-Feedback/" Fecha.Year "/" Fecha.Month "/" Fecha.Day.ToString("d2") "/" "Production state data.htm";
if (File.Exists(url) == true)
{
rawDoc.Load(url);
string cleanString = rawDoc.DocumentNode.InnerText.Trim().Replace(" ", "");
cleanString = Regex.Replace(cleanString, @"^\s $[\r\n]*", string.Empty, RegexOptions.Multiline);
tempList = Regex.Split(cleanString, "\r\n|\r|\n").ToList();
tempList.RemoveRange(0, 5);
for (int j = 0; j < tempList.Count; j )
{
if (tempList[j].StartsWith("ProductionTerminated") || tempList[j].StartsWith("ProductionInterrumpted"))
{
tempList.Insert(j 4, "PressSingleCycleActivated=0");
}
}
}
return tempList;
}
public static List<string> ModifyList(List<string> completeListDocument)
{
for (int i = 0; i < completeListDocument.Count; i )
{
if (completeListDocument[i].StartsWith("MachineSetup"))
{
completeListDocument.RemoveRange(i, 6);
i--;
}
}
return completeListDocument;
}
}
uj5u.com熱心網友回復：
您可以做的最簡單的事情是在修改串列之前復制它：
public static List<string> ModifyList(List<string> completeListDocument)
{
var results = new List<string>(completeListDocument);
for (int i = 0; i < results.Count; i )
{
if (results[i].StartsWith("MachineSetup"))
{
results.RemoveRange(i, 6);
i--;
}
}
return results;
}
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