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//------------------------------------------------------------------------------
// <copyright file="DataBinding.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
/*
*/
namespace System.Web.UI {
using System;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Data;
using System.Globalization;
using System.Security.Permissions;
using System.Web.Util;
/// <devdoc>
/// <para>Enables RAD designers to create data binding expressions
/// at design time. This class cannot be inherited.</para>
/// </devdoc>
public sealed class DataBinding {
private string propertyName;
private Type propertyType;
private string expression;
/// <devdoc>
/// <para>Initializes a new instance of the <see cref='System.Web.UI.DataBinding'/> class.</para>
/// </devdoc>
public DataBinding(string propertyName, Type propertyType, string expression) {
this.propertyName = propertyName;
this.propertyType = propertyType;
this.expression = expression;
}
/// <devdoc>
/// <para>Indicates the data binding expression to be evaluated.</para>
/// </devdoc>
public string Expression {
get {
return expression;
}
set {
Debug.Assert((value != null) && (value.Length != 0),
"Invalid expression");
expression = value;
}
}
/// <devdoc>
/// <para>Indicates the name of the property that is to be data bound against. This
/// property is read-only.</para>
/// </devdoc>
public string PropertyName {
get {
return propertyName;
}
}
/// <devdoc>
/// <para>Indicates the type of the data bound property. This property is
/// read-only.</para>
/// </devdoc>
public Type PropertyType {
get {
return propertyType;
}
}
/// <devdoc>
/// DataBinding objects are placed in a hashtable representing the collection
/// of bindings on a control. There can only be one binding/property, so
/// the hashcode computation should match the Equals implementation and only
/// take the property name into account.
/// </devdoc>
public override int GetHashCode() {
return propertyName.ToLower(CultureInfo.InvariantCulture).GetHashCode();
}
/// <devdoc>
/// </devdoc>
public override bool Equals(object obj) {
if ((obj != null) && (obj is DataBinding)) {
DataBinding binding = (DataBinding)obj;
return StringUtil.EqualsIgnoreCase(propertyName, binding.PropertyName);
}
return false;
}
}
}
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