如何在 ASP.NET MVC 中枚举表单集合？

Question

我如何枚举所有的键/值 ASP.NET MVC 中的 FormCollection (system.web.mvc)？

Answer 1

以下是专门针对 FormCollection 对象执行此操作的 3 种方法。

public ActionResult SomeActionMethod(FormCollection formCollection)
{
  foreach (var key in formCollection.AllKeys)
  {
    var value = formCollection[key];
  }

  foreach (var key in formCollection.Keys)
  {
    var value = formCollection[key.ToString()];
  }

  // Using the ValueProvider
  var valueProvider = formCollection.ToValueProvider();
  foreach (var key in valueProvider.Keys)
  {
    var value = valueProvider[key];
  }
}

Answer 2

foreach(KeyValuePair<string, ValueProviderResult> kvp in form.ToValueProvider())
{
    string htmlControlName = kvp.Key;
    string htmlControlValue = kvp.Value.AttemptedValue;
}

Answer 3

foreach(var key in Request.Form.AllKeys)
{
   var value = Request.Form[key];
}

Answer 4

在.NET Framework 4.0中，使用ValueProvider的代码是：

        IValueProvider valueProvider = formValues.ToValueProvider();
        foreach (string key in formValues.Keys)
        {
            ValueProviderResult result = valueProvider.GetValue(key);
            string value = result.AttemptedValue;
        }

Answer 5

我用这个：

string keyname;
string keyvalue;

for (int i = 0; i <= fc.Count - 1; i++)
{
    keyname = fc.AllKeys[i];
    keyvalue = fc[i];
}

希望它能帮助别人。

Answer 6

在 VB.Net 中：

Dim fv As KeyValuePair(Of String, ValueProviderResult)
For Each fv In formValues.ToValueProvider
    Response.Write(fv.Key + ": " + fv.Value.AttemptedValue)
Next