DataControlImageButton.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / UI / WebControls / DataControlImageButton.cs / 1 / DataControlImageButton.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Web.UI.WebControls { 
 
    using System;
    using System.Drawing; 
    using System.Web.Util;


    ///  
    ///  Derived version of ImageButton used within a DataControl.
    ///  
    [SupportsEventValidation] 
    internal sealed class DataControlImageButton : ImageButton {
 
        IPostBackContainer _container;
        string _callbackArgument;
        bool _enableCallback;
 
        internal DataControlImageButton(IPostBackContainer container) {
            _container = container; 
        } 

        public override bool CausesValidation { 
            get {
                return false;
            }
            set { 
                throw new NotSupportedException(SR.GetString(SR.CannotSetValidationOnDataControlButtons));
            } 
        } 

        internal void EnableCallback(string argument) { 
            _enableCallback = true;
            _callbackArgument = argument;
        }
 
        protected sealed override PostBackOptions GetPostBackOptions() {
            if (_container != null) { 
                return _container.GetPostBackOptions(this); 
            }
 
            return base.GetPostBackOptions();
        }

        protected internal override void Render(HtmlTextWriter writer) { 
            SetCallbackProperties();
            base.Render(writer); 
        } 

        private void SetCallbackProperties() { 
            if (_enableCallback) {
                ICallbackContainer _callbackContainer = _container as ICallbackContainer;
                if (_callbackContainer != null) {
                    string callbackScript = _callbackContainer.GetCallbackScript(this, _callbackArgument); 
                    if (!String.IsNullOrEmpty(callbackScript)) {
                        this.OnClientClick = callbackScript; 
                    } 
                }
            } 
        }
    }
}

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