在回传中持久化GridView数据? [英] Persisting GridView data across PostBacks?

问题描述

好的，这是我的基本ASP.NET页面设置:我有一个带有GridView的页面，其中包含ContentTemplates.您可以随时添加行和编辑/删除行.有一个新建"按钮可以创建新行.

Alright, so here's my basic ASP.NET page setup: I've got a page with a GridView that has ContentTemplates in it. You can add a row and edit/remove rows at any time. There's a "New" button that creates a new row.

所有这些数据都绑定到自定义数据对象.因此，如果我有一个"People"的GridView，并且每一行都有"FirstName"，"LastName"和"Gender"(带有TextBox和DropDown控件)，那么我将拥有一个"Person"对象，该对象具有"FirstName"的公共属性. ，"LastName"等.我已经正确设置了绑定，并且可以将数据从对象推送到GridView中，并且可以使用Session变量保留对象.我的页面生命周期结构如下所示:

All of this data is bound to custom data objects. So if I have a GridView of "People" and each row has "FirstName", "LastName", and "Gender" (with TextBox and DropDown controls), I then have a "Person" object which has public properties for "FirstName", "LastName", etc. I have the binding set up correctly, and I can push data into the GridView from the object, and I persist the object with the Session variable. My page lifetime structure looks something like this:

• Page_Load:从Session()
加载List(Of Person)
• 任何事件都会触发，并修改List(Of Person).
• 发生任何事件后，List(Of Person)都将保存回到Session()中，然后被DataBound绑定到GridView(随后的任何字段也都是DataBound，例如DropDownList.

• Page_Load: Loads the List(Of Person) from Session()
• Any events fire, and modify the List(Of Person).
• After any event, the List(Of Person) gets saved back into Session(), and is then DataBound to the GridView (and any subsequent fields are also DataBound, such as the DropDownList.

我的问题是:每当我在GridView中填写行，然后添加新行(无论如何都不会保存数据库)时，我的字段就会清除，并且不会在PostBacks中持续存在.那么，如何通过回发之间的数据绑定来保留我的自定义数据对象呢?

My question is: Whenever I fill in rows in the GridView, and then add a new row (there is no database saving going on whatsoever), my fields clear out and don't persist across PostBacks. So, how can I persist my custom data objects with databinding across postbacks?

推荐答案

自己弄清楚了.我只需要处理TextChanged，SelectedIndexChanged等事件，然后将新数据保存到我的自定义对象中.现在我想到了，就说得通了.

Figured it out myself. I just needed to handle the TextChanged, SelectedIndexChanged, etc. events and then save the new data into my custom objects there. Makes sense now that I think about it.

感谢大家的帮助.

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