How can a formcollection be enumerated in ASP.NET MVC?
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11-09-2019 - |
Question
How can I enumerate through all the key/values of a FormCollection (system.web.mvc) in ASP.NET MVC?
Solution
Here are 3 ways to do it specifically with a FormCollection object.
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];
}
}
OTHER TIPS
foreach(KeyValuePair<string, ValueProviderResult> kvp in form.ToValueProvider())
{
string htmlControlName = kvp.Key;
string htmlControlValue = kvp.Value.AttemptedValue;
}
foreach(var key in Request.Form.AllKeys)
{
var value = Request.Form[key];
}
In .NET Framework 4.0, the code to use the ValueProvider is:
IValueProvider valueProvider = formValues.ToValueProvider();
foreach (string key in formValues.Keys)
{
ValueProviderResult result = valueProvider.GetValue(key);
string value = result.AttemptedValue;
}
I use this:
string keyname;
string keyvalue;
for (int i = 0; i <= fc.Count - 1; i++)
{
keyname = fc.AllKeys[i];
keyvalue = fc[i];
}
hope it helps someone.
And in VB.Net:
Dim fv As KeyValuePair(Of String, ValueProviderResult)
For Each fv In formValues.ToValueProvider
Response.Write(fv.Key + ": " + fv.Value.AttemptedValue)
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