如何在C＃中添加where到foreach循环中

Question

I have the following:

foreach ( var menuItem in  Model.menuItems) {
  if (menuItem.Type == "02") {

  }
}

The code within the foreach executes only when Type==2 so is there some way that I could add the check for Type == "02" into the top part of my loop.

Answer 1

List(Of T).ForEach Method : Performs the specified action on each element of the List(Of T) .

Model.menuItems.Where(c => c.Type == "02").ToList().ForEach(delegate(type data)
        {
            //code to execute

        });

Answer 2

Try

foreach ( var menuItem in  Model.menuItems.Where(mi => mi.Type == "02") {

}

Answer 3

LINQ:

foreach (var menuItem in  Model.menuItems.Where(item => item.Type == "02")) {
}

Answer 4

You can do this with linq using the following:

foreach ( var menuItem in  Model.menuItems.Where(m=>m.Type == "02") {

}

Answer 5

If your menuItems already are enumerable:

foreach (var menuItem in  Model.menuItems.Where(c => c.Type == "02")) { 
} 

Otherwise try:

foreach (var menuItem in  Model.menuItems.AsEnumerable().Where(c => c.Type == "02")) { 
} 

Or:

foreach (var menuItem in  Model.menuItems.ToList().Where(c => c.Type == "02")) { 
} 

Answer 6

做

foreach ( var menuItem in  Model.menuItems.Where(m => m.Type == "02")) {}

Answer 7

how about

foreach ( var menuItem in  Model.menuItems.Where(m => m.Type == "02")) {

}