asp.net原理Version1.0
Asp.Net原理Version2.0
相关源码
页面的PRocess方法
1 // System.Web.UI.Page 2 private void ProcessRequest(bool includeStagesBeforeAsyncPoint, bool includeStagesAfterAsyncPoint) 3 { 4 if (includeStagesBeforeAsyncPoint) 5 { 6 //调用子类的方法(这是个虚方法),1,创建页面控件树 7 this.FrameworkInitialize(); 8 base.ControlState = ControlState.FrameworkInitialized; 9 }10 bool flag = this.Context.WorkerRequest is IIS7WorkerRequest;11 try12 {13 try14 {15 if (this.IsTransacted)16 {17 this.ProcessRequestTransacted();18 }19 else20 {21 //页面声明周期的主要部分22 this.ProcessRequestMain(includeStagesBeforeAsyncPoint, includeStagesAfterAsyncPoint);23 }24 if (includeStagesAfterAsyncPoint)25 {26 flag = false;27 this.ProcessRequestEndTrace();28 }29 }30 catch (ThreadAbortException)31 {32 try33 {34 if (flag)35 {36 this.ProcessRequestEndTrace();37 }38 }39 catch40 {41 }42 }43 finally44 {45 if (includeStagesAfterAsyncPoint)46 {47 this.ProcessRequestCleanup();48 }49 }50 }51 catch52 {53 throw;54 }55 }
ProcessRequestMain方法
1 // System.Web.UI.Page 2 private void ProcessRequestMain(bool includeStagesBeforeAsyncPoint, bool includeStagesAfterAsyncPoint) 3 { 4 try 5 { 6 HttpContext context = this.Context; 7 string text = null; 8 if (includeStagesBeforeAsyncPoint) 9 { 10 if (this.IsInAspCompatMode) 11 { 12 AspCompatapplicationStep.OnPageStartsessionObjects(); 13 } 14 if (this.PageAdapter != null) 15 { 16 this._requestValueCollection = this.PageAdapter.DeterminePostBackMode(); 17 } 18 else 19 { 20 this._requestValueCollection = this.DeterminePostBackMode(); 21 } 22 string text2 = string.Empty; 23 if (this.DetermineIsExportingWebPart()) 24 { 25 if (!RuntimeConfig.GetAppConfig().WebParts.EnableExport) 26 { 27 throw new InvalidOperationException(SR.GetString("WebPartExportHandler_DisabledExportHandler")); 28 } 29 text = this.Request.QueryString["webPart"]; 30 if (string.IsNullOrEmpty(text)) 31 { 32 throw new InvalidOperationException(SR.GetString("WebPartExportHandler_InvalidArgument")); 33 } 34 if (string.Equals(this.Request.QueryString["scope"], "shared", StringComparison.OrdinalIgnoreCase)) 35 { 36 this._pageFlags.Set(4); 37 } 38 string text3 = this.Request.QueryString["query"]; 39 if (text3 == null) 40 { 41 text3 = string.Empty; 42 } 43 this.Request.QueryStringText = text3; 44 context.Trace.IsEnabled = false; 45 } 46 47 //2,确定IsCallback值 48 if (this._requestValueCollection != null) 49 { 50 if (this._requestValueCollection["__VIEWSTATEENCRYPTED"] != null) 51 { 52 this.ContainsEncryptedViewState = true; 53 } 54 text2 = this._requestValueCollection["__CALLBACKID"]; 55 if (text2 != null && this._request.HttpVerb == HttpVerb.POST) 56 { 57 this._isCallback = true; 58 } 59 else 60 { 61 if (!this.IsCrossPagePostBack) 62 { 63 VirtualPath virtualPath = null; 64 if (this._requestValueCollection["__PREVIOUSPAGE"] != null) 65 { 66 try 67 { 68 virtualPath = VirtualPath.CreateNonRelativeAllowNull(Page.DecryptString(this._requestValueCollection["__PREVIOUSPAGE"])); 69 } 70 catch 71 { 72 this._pageFlags[8] = true; 73 } 74 if (virtualPath != null && virtualPath != this.Request.CurrentExecutionFilePathObject) 75 { 76 this._pageFlags[8] = true; 77 this._previousPagePath = virtualPath; 78 } 79 } 80 } 81 } 82 } 83 if (this.MaintainScrollPositionOnPostBack) 84 { 85 this.LoadScrollPosition(); 86 } 87 if (context.TraceIsEnabled) 88 { 89 this.Trace.Write("aspx.page", "Begin PreInit"); 90 } 91 if (EtwTrace.IsTraceEnabled(5, 4)) 92 { 93 EtwTrace.Trace(EtwTraceType.ETW_TYPE_PAGE_PRE_INIT_ENTER, this._context.WorkerRequest); 94 } 95 96 //3.1初始化PreInit 97 this.PerformPreInit(); 98 if (EtwTrace.IsTraceEnabled(5, 4)) 99 {100 EtwTrace.Trace(EtwTraceType.ETW_TYPE_PAGE_PRE_INIT_LEAVE, this._context.WorkerRequest);101 }102 if (context.TraceIsEnabled)103 {104 this.Trace.Write("aspx.page", "End PreInit");105 }106 if (context.TraceIsEnabled)107 {108 this.Trace.Write("aspx.page", "Begin Init");109 }110 if (EtwTrace.IsTraceEnabled(5, 4))111 {112 EtwTrace.Trace(EtwTraceType.ETW_TYPE_PAGE_INIT_ENTER, this._context.WorkerRequest);113 }114 //3.2递归初始化,因为要初始化树,所以用递归115 this.InitRecursive(null);116 if (EtwTrace.IsTraceEnabled(5, 4))117 {118 EtwTrace.Trace(EtwTraceType.ETW_TYPE_PAGE_INIT_LEAVE, this._context.WorkerRequest);119 }120 if (context.TraceIsEnabled)121 {122 this.Trace.Write("aspx.page", "End Init");123 }124 if (context.TraceIsEnabled)125 {126 this.Trace.Write("aspx.page", "Begin InitComplete");127 }128 //3.3,初始化完成129 this.OnInitComplete(EventArgs.Empty);130 if (context.TraceIsEnabled)131 {132 this.Trace.Write("aspx.page", "End InitComplete");133 }134 if (this.IsPostBack)135 {136 if (context.TraceIsEnabled)137 {138 this.Trace.Write("aspx.page", "Begin LoadState");139 }140 if (EtwTrace.IsTraceEnabled(5, 4))141 {142 EtwTrace.Trace(EtwTraceType.ETW_TYPE_PAGE_LOAD_VIEWSTATE_ENTER, this._context.WorkerRequest);143 }144 //4.1,加载ViewState145 this.LoadAllState();146 if (EtwTrace.IsTraceEnabled(5, 4))147 {148 EtwTrace.Trace(EtwTraceType.ETW_TYPE_PAGE_LOAD_VIEWSTATE_LEAVE, this._context.WorkerRequest);149 }150 if (context.TraceIsEnabled)151 {152 this.Trace.Write("aspx.page", "End LoadState");153 this.Trace.Write("aspx.page", "Begin ProcessPostData");154 }155 if (EtwTrace.IsTraceEnabled(5, 4))156 {157 EtwTrace.Trace(EtwTraceType.ETW_TYPE_PAGE_LOAD_POSTDATA_ENTER, this._context.WorkerRequest);158 }159 //4.2,处理回发数据160 this.ProcessPostData(this._requestValueCollection, true);161 if (EtwTrace.IsTraceEnabled(5, 4))162 {163 EtwTrace.Trace(EtwTraceType.ETW_TYPE_PAGE_LOAD_POSTDATA_LEAVE, this._context.WorkerRequest);164 }165 if (context.TraceIsEnabled)166 {167 this.Trace.Write("aspx.page", "End ProcessPostData");168 }169 }170 if (context.TraceIsEnabled)171 {172 this.Trace.Write("aspx.page", "Begin PreLoad");173 }174 //5.1页面预加载175 this.OnPreLoad(EventArgs.Empty);176 if (context.TraceIsEnabled)177 {178 this.Trace.Write("aspx.page", "End PreLoad");179 }180 if (context.TraceIsEnabled)181 {182 this.Trace.Write("aspx.page", "Begin Load");183 }184 if (EtwTrace.IsTraceEnabled(5, 4))185 {186 EtwTrace.Trace(EtwTraceType.ETW_TYPE_PAGE_LOAD_ENTER, this._context.WorkerRequest);187 }188 //5.2页面递归加载189 this.LoadRecursive();190 if (EtwTrace.IsTraceEnabled(5, 4))191 {192 EtwTrace.Trace(EtwTraceType.ETW_TYPE_PAGE_LOAD_LEAVE, this._context.WorkerRequest);193 }194 if (context.TraceIsEnabled)195 {196 this.Trace.Write("aspx.page", "End Load");197 }198 if (this.IsPostBack)199 {200 if (context.TraceIsEnabled)201 {202 this.Trace.Write("aspx.page", "Begin ProcessPostData Second Try");203 }204 //5.3第二次尝试加载回发数据205 this.ProcessPostData(this._leftoverPostData, false);206 if (context.TraceIsEnabled)207 {208 this.Trace.Write("aspx.page", "End ProcessPostData Second Try");209 this.Trace.Write("aspx.page", "Begin Raise ChangedEvents");210 }211 if (EtwTrace.IsTraceEnabled(5, 4))212 {213 EtwTrace.Trace(EtwTraceType.ETW_TYPE_PAGE_POST_DATA_CHANGED_ENTER, this._context.WorkerRequest);214 }215 //6.1,触发Change事件216 this.RaiseChangedEvents();217 if (EtwTrace.IsTraceEnabled(5, 4))218 {219 EtwTrace.Trace(EtwTraceType.ETW_TYPE_PAGE_POST_DATA_CHANGED_LEAVE, this._context.WorkerRequest);220 }221 if (context.TraceIsEnabled)222 {223 this.Trace.Write("aspx.page", "End Raise ChangedEvents");224 this.Trace.Write("aspx.page", "Begin Raise PostBackEvent");225 }226 if (EtwTrace.IsTraceEnabled(5, 4))227 {228 EtwTrace.Trace(EtwTraceType.ETW_TYPE_PAGE_RAISE_POSTBACK_ENTER, this._context.WorkerRequest);229 }230 //6.2,触发点击事件231 this.RaisePostBackEvent(this._requestValueCollection);232 if (EtwTrace.IsTraceEnabled(5, 4))233 {234 EtwTrace.Trace(EtwTraceType.ETW_TYPE_PAGE_RAISE_POSTBACK_LEAVE, this._context.WorkerRequest);235 }236 if (context.TraceIsEnabled)237 {238 this.Trace.Write("aspx.page", "End Raise PostBackEvent");239 }240 }241 if (context.TraceIsEnabled)242 {243 this.Trace.Write("aspx.page", "Begin LoadComplete");244 }245 //5.3,页面加载完成246 this.OnLoadComplete(EventArgs.Empty);247 if (context.TraceIsEnabled)248 {249 this.Trace.Write("aspx.page", "End LoadComplete");250 }251 if (this.IsPostBack && this.IsCallback)252 {253 this.PrepareCallback(text2);254 }255 else256 {257 if (!this.IsCrossPagePostBack)258 {259 if (context.TraceIsEnabled)260 {261 this.Trace.Write("aspx.page", "Begin PreRender");262 }263 if (EtwTrace.IsTraceEnabled(5, 4))264 {265 EtwTrace.Trace(EtwTraceType.ETW_TYPE_PAGE_PRE_RENDER_ENTER, this._context.WorkerRequest);266 }267 268 //7,递归预渲染269 this.PreRenderRecursiveInternal();270 if (EtwTrace.IsTraceEnabled(5, 4))271 {272 EtwTrace.Trace(EtwTraceType.ETW_TYPE_PAGE_PRE_RENDER_LEAVE, this._context.WorkerRequest);273 }274 if (context.TraceIsEnabled)275 {276 this.Trace.Write("aspx.page", "End PreRender");277 }278 }279 }280 }281 if (this._asyncInfo == null || this._asyncInfo.CallerIsBlocking)282 {283 this.ExecuteRegisteredAsyncTasks();284 }285 this._request.ValidateRawUrl();286 if (includeStagesAfterAsyncPoint)287 {288 if (this.IsCallback)289 {290 this.RenderCallback();291 }292 else293 {294 if (!this.IsCrossPagePostBack)295 {296 if (context.TraceIsEnabled)297 {298 this.Trace.Write("aspx.page", "Begin PreRenderComplete");299 }300 this.PerformPreRenderComplete();301 if (context.TraceIsEnabled)302 {303 this.Trace.Write("aspx.page", "End PreRenderComplete");304 }305 if (context.TraceIsEnabled)306 {307 this.BuildPageProfileTree(this.EnableViewState);308 this.Trace.Write("aspx.page", "Begin SaveState");309 }310 if (EtwTrace.IsTraceEnabled(5, 4))311 {312 EtwTrace.Trace(EtwTraceType.ETW_TYPE_PAGE_SAVE_VIEWSTATE_ENTER, this._context.WorkerRequest);313 }314 //8,保存页面状态到ViewState315 this.SaveAllState();316 if (EtwTrace.IsTraceEnabled(5, 4))317 {318 EtwTrace.Trace(EtwTraceType.ETW_TYPE_PAGE_SAVE_VIEWSTATE_LEAVE, this._context.WorkerRequest);319 }320 if (context.TraceIsEnabled)321 {322 this.Trace.Write("aspx.page", "End SaveState");323 this.Trace.Write("aspx.page", "Begin SaveStateComplete");324 }325 this.OnSaveStateComplete(EventArgs.Empty);326 if (context.TraceIsEnabled)327 {328 this.Trace.Write("aspx.page", "End SaveStateComplete");329 this.Trace.Write("aspx.page", "Begin Render");330 }331 if (EtwTrace.IsTraceEnabled(5, 4))332 {333 EtwTrace.Trace(EtwTraceType.ETW_TYPE_PAGE_RENDER_ENTER, this._context.WorkerRequest);334 }335 if (text != null)336 {337 this.ExportWebPart(text);338 }339 else340 {341 //9,渲染出HTML342 this.RenderControl(this.CreateHtmlTextWriter(this.Response.Output));343 }344 if (EtwTrace.IsTraceEnabled(5, 4))345 {346 EtwTrace.Trace(EtwTraceType.ETW_TYPE_PAGE_RENDER_LEAVE, this._context.WorkerRequest);347 }348 if (context.TraceIsEnabled)349 {350 this.Trace.Write("aspx.page", "End Render");351 }352 this.CheckRemainingAsyncTasks(false);353 }354 }355 }356 }357 catch (ThreadAbortException ex2)358 {359 HttpApplication.CancelModuleException ex = ex2.ExceptionState as HttpApplication.CancelModuleException;360 if (!includeStagesBeforeAsyncPoint || !includeStagesAfterAsyncPoint || this._context.Handler != this || this._context.ApplicationInstance == null || ex == null || ex.Timeout)361 {362 this.CheckRemainingAsyncTasks(true);363 throw;364 }365 this._context.ApplicationInstance.CompleteRequest();366 Page.ThreadResetAbortWithAssert();367 }368 catch (ConfigurationException)369 {370 throw;371 }372 catch (Exception e)373 {374 PerfCounters.IncrementCounter(AppPerfCounter.ERRORS_DURING_REQUEST);375 PerfCounters.IncrementCounter(AppPerfCounter.ERRORS_TOTAL);376 if (!this.HandleError(e))377 {378 throw;379 }380 }381 }
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