c# - 如何将谓词传递给 C# 中的函数？

Question

我有:

 public void InitializeStatusList(DropDownList list)
    {
       var dictionaryEntries = GetEntriesFromDatabase();
       list.DataSource = dictionaryEntries.Where(entry => entry is EntryStatus1 || entry is EntryStatus2);
       list.DataBind();           
    }

我有很多这样的功能。我想用作为谓词传递的 dictionaryEntries 查询条件编写通用函数。

例如:

public void InitializeStatusList(DropDownList list)
{
    CommonInitializeStatusList(DropDownList list, entry => entry is EntryStatus1 || entry is EntryStatus2);
}

public void CommonInitializeStatusList(DropDownList list, ??????????????? predicate)
{                       
    var dictionaryEntries = GetEntriesFromDatabase();
    list.DataSource = dictionaryEntries.Where(predicate);
    list.DataBind();        
}

什么代表????????????????

提前致谢

Answer 1

Func<Entry, bool> predicate应该工作，在哪里 Entry是 entry 的类型变量。