64 lines
2.7 KiB
C#
64 lines
2.7 KiB
C#
using System.ComponentModel;
|
|
using System.Diagnostics.CodeAnalysis;
|
|
using System.Web.UI;
|
|
using System.Web.UI.WebControls;
|
|
|
|
namespace System.Web.ModelBinding {
|
|
|
|
public sealed class ControlValueProvider : SimpleValueProvider {
|
|
|
|
public string PropertyName {
|
|
get;
|
|
private set;
|
|
}
|
|
|
|
[SuppressMessage("Microsoft.Globalization", "CA1304:SpecifyCultureInfo", MessageId = "System.Web.ModelBinding.SimpleValueProvider.#ctor(System.Web.ModelBinding.ModelBindingExecutionContext)",
|
|
Justification = "SimpleValueProvider Constructor specifies the CultureInfo")]
|
|
public ControlValueProvider(ModelBindingExecutionContext modelBindingExecutionContext, string propertyName)
|
|
: base(modelBindingExecutionContext) {
|
|
PropertyName = propertyName;
|
|
}
|
|
|
|
protected override object FetchValue(string controlId) {
|
|
if (String.IsNullOrEmpty(controlId)) {
|
|
return null;
|
|
}
|
|
|
|
Control dataControl = ModelBindingExecutionContext.GetService<Control>();
|
|
|
|
//Following code taken from ControlParameter - code duplicated because ControlPrameter throws exceptions whereas we do not.
|
|
string propertyName = PropertyName;
|
|
|
|
//Bug Fix # 280051 : First try to find it on dataControl as DataBoundControlHelper.FindControl only walks up starting from dataControl's NamingContainer.
|
|
Control foundControl = dataControl.FindControl(controlId) ?? DataBoundControlHelper.FindControl(dataControl, controlId);
|
|
|
|
if (foundControl == null) {
|
|
return null;
|
|
}
|
|
|
|
ControlValuePropertyAttribute controlValueProp = (ControlValuePropertyAttribute)TypeDescriptor.GetAttributes(foundControl)[typeof(ControlValuePropertyAttribute)];
|
|
|
|
// If no property name is specified, use the ControlValuePropertyAttribute to determine which property to use.
|
|
if (String.IsNullOrEmpty(propertyName)) {
|
|
if ((controlValueProp != null) && (!String.IsNullOrEmpty(controlValueProp.Name))) {
|
|
propertyName = controlValueProp.Name;
|
|
}
|
|
else {
|
|
return null;
|
|
}
|
|
}
|
|
|
|
// Get the value of the property
|
|
object value = DataBinder.Eval(foundControl, propertyName);
|
|
|
|
// Convert the value to null if this is the default property and the value is the property's default value
|
|
if (controlValueProp != null &&
|
|
controlValueProp.DefaultValue != null &&
|
|
controlValueProp.DefaultValue.Equals(value)) {
|
|
return null;
|
|
}
|
|
return value;
|
|
}
|
|
}
|
|
}
|