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using System.Diagnostics.CodeAnalysis;
using System.Web.UI;
namespace System.Web.ModelBinding {
/// <summary>
/// Provides a value from Page's ViewState.
/// </summary>
public sealed class ViewStateValueProvider : SimpleValueProvider {
[SuppressMessage("Microsoft.Globalization", "CA1304:SpecifyCultureInfo", MessageId = "System.Web.ModelBinding.SimpleValueProvider.#ctor(System.Web.ModelBinding.ModelBindingExecutionContext)",
Justification = "SimpleValueProvider Constructor specifies the CultureInfo")]
public ViewStateValueProvider(ModelBindingExecutionContext modelBindingExecutionContext)
: base(modelBindingExecutionContext) {
}
protected override object FetchValue(string key) {
StateBag pageViewState = ModelBindingExecutionContext.GetService<StateBag>();
if (pageViewState != null) {
return pageViewState[key];
}
return null;
}
}
}
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