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/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / Extensions / UI / WebControls / DataPagerField.cs / 1305376 / DataPagerField.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- using System; using System.ComponentModel; using System.Diagnostics.CodeAnalysis; using System.Web; using System.Web.UI; namespace System.Web.UI.WebControls { public abstract class DataPagerField : IStateManager { private StateBag _stateBag; private bool _trackViewState; private DataPager _dataPager; internal event EventHandler FieldChanged; protected DataPagerField() { _stateBag = new StateBag(); } protected StateBag ViewState { get { return _stateBag; } } protected bool IsTrackingViewState { get { return _trackViewState; } } protected DataPager DataPager { get { return _dataPager; } } protected bool QueryStringHandled { get { return DataPager.QueryStringHandled; } set { DataPager.QueryStringHandled = value; } } protected string QueryStringValue { get { return DataPager.QueryStringValue; } } [ Category("Behavior"), DefaultValue(true), ResourceDescription("DataPagerField_Visible") ] public bool Visible { get { object o = ViewState["Visible"]; if (o != null) { return (bool)o; } return true; } set { if (value != Visible) { ViewState["Visible"] = value; OnFieldChanged(); } } } protected internal DataPagerField CloneField() { DataPagerField newField = CreateField(); CopyProperties(newField); return newField; } protected virtual void CopyProperties(DataPagerField newField) { newField.Visible = Visible; } public abstract void CreateDataPagers(DataPagerFieldItem container, int startRowIndex, int maximumRows, int totalRowCount, int fieldIndex); protected abstract DataPagerField CreateField(); [SuppressMessage("Microsoft.Design", "CA1055:UriReturnValuesShouldNotBeStrings", Justification="Return value matches HyperLink.NavigateUrl property type.")] protected string GetQueryStringNavigateUrl(int pageNumber) { return DataPager.GetQueryStringNavigateUrl(pageNumber); } [SuppressMessage("Microsoft.Security", "CA2109:ReviewVisibleEventHandlers", MessageId = "0#")] public abstract void HandleEvent(CommandEventArgs e); protected virtual void LoadViewState(object savedState) { if (savedState != null) { object[] myState = (object[])savedState; if (myState[0] != null) ((IStateManager)ViewState).LoadViewState(myState[0]); } } protected virtual void OnFieldChanged() { if (FieldChanged != null) { FieldChanged(this, EventArgs.Empty); } } protected virtual object SaveViewState() { object state = ((IStateManager)ViewState).SaveViewState(); if ((state != null)) { return new object[1] { state }; } return null; } internal void SetDirty() { _stateBag.SetDirty(true); } internal void SetDataPager(DataPager dataPager) { _dataPager = dataPager; } protected virtual void TrackViewState() { _trackViewState = true; ((IStateManager)ViewState).TrackViewState(); } #region IStateManager ////// /// Return true if tracking state changes. /// bool IStateManager.IsTrackingViewState { get { return IsTrackingViewState; } } ////// /// Load previously saved state. /// void IStateManager.LoadViewState(object state) { LoadViewState(state); } ////// /// Start tracking state changes. /// void IStateManager.TrackViewState() { TrackViewState(); } ////// /// Return object containing state changes. /// object IStateManager.SaveViewState() { return SaveViewState(); } #endregion IStateManager } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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