ispostback | 易学教程

Asp.net DropDownList isPostBack is alwasy false

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问题 I'm new to ASP and I've come across a problem that I've been at all day! im using a and my postback is constantly returning false, thus my selectedIndexChanged method never gets a chance to run! Here is my code: <table border="1"> <tr> <th> Build version: </th> <th> <%-- Html.DropDownList("Builds", null, new {@onchange = "onChange(this.value);" }) --%> <%-- Html.DropDownList("BuildID", (SelectList) ViewBag.Builds, "--Select One--") --%> <%-- Html.DropDownList("BuildDD", (IEnumerable

Refresh of Page set PostBack = true

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问题 I have one of a aspx page in my asp.net project which has a button control after clicking on the button and then refreshing the page using F5 key or refresh button of the browser, instead of setting IsPostBack property to false, it is setting it to true. Can anyone help me out of this? 回答1: Clicking the button triggers a HttpPost of the form and it's posted to the same page, which is what's called a post back. Refreshing the page triggers the last executed action, which in this case was a

How does IsPostback technically work?

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I'm currently having a strange issue whereby all browsers except from Google Chrome are registering a call to IsPostback within a Page_Load event as true when I click an asp.net button which simply posts back to the same page. This has led me to try and discover how the IsPostback property within an ASP .Net page is technically implemented, something I'm struggling to find. My thoughts to date are that it could be related to the following; The request VERB type is POST rather than GET. The hidden input containing the Viewstate information has no information present and therefore no previously

How does IsPostback technically work?

阅读更多关于 How does IsPostback technically work?

问题 I'm currently having a strange issue whereby all browsers except from Google Chrome are registering a call to IsPostback within a Page_Load event as true when I click an asp.net button which simply posts back to the same page. This has led me to try and discover how the IsPostback property within an ASP .Net page is technically implemented, something I'm struggling to find. My thoughts to date are that it could be related to the following; The request VERB type is POST rather than GET. The