¿Cómo se puede enumerar un formcollection en ASP.NET MVC?

Question

¿Cómo puedo enumerar todas las claves/valores de a FormCollection (system.web.mvc) en ASP.NET MVC?

Answer 1

Aquí hay 3 maneras de hacerlo específicamente con un objeto FormCollection.

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

Answer 3

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

Answer 4

Y en VB.Net:

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

Answer 5

Yo uso este:

string keyname; 
string keyvalue; 

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

espero que ayude a alguien.

Answer 6

En .NET Framework 4.0, el código para utilizar el ValueProvider es:

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