哪些值的浏览器收集的回传数据？ [英] Which values browser collects as a postback data?

问题描述

当页面被回发到服务器，浏览器收集每个控件的当前值并将其粘贴在一起成为一个字符串。此回发的数据然后通过HTTP POST发送回服务器。

When page is to be posted back to the server, browser collects the current values of each control and pastes it together into a string. This postback data is then sent back to the server via HTTP POST.

Q1 - 除了控件的Text属性和的SelectedIndexChanged（因此除了用户输入的数据），是否有其他属性/这是由浏览器保存为回传数据的控制值

Q1 - Besides control’s Text attributes and SelectedIndexchanged ( thus besides user input data), are there other attributes/values of a control which are saved by a browser as postback data?

Q2 - 如果GridView控件，哪个值保存在回发一个浏览器？只有那些其中用户选择要编辑的行？

Q2 - In case of GridView, which values are saved by a browser on a postback? Only those in a row which the user chooses to edit?

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推荐答案

textarea的值，选择， 输入和按钮字段在后返回。每个值是一个键值对，其中的关键是名称元素的属性。

The values of textarea, select, input and button fields are returned in the post. Each value is a key-value pair where the key is the name property of the element.

我想我已经得到了所有包含在后数据的元素：

I think that I have got all the elements that include data in the post:

• 文本区域：在值属性为包括在内，即什么类型的文本区域

• textarea: The value propery is included, i.e. what's typed in the textarea.

选择：在值所选选项的属性包括在内。如果所选的选项没有一个值指定的属性，在选项的文本使用。

select: The value property of the selected option is included. If the selected option doesn't have a value property specified, the text of the option is used.

输入类型=文本：在值属性包含，即什么类型的输入字段。

input type="text": The value property is included, i.e. what's typed in the input field.

输入类型=密码：在值属性包含，即什么类型的输入字段。

input type="password": The value property is included, i.e. what's typed in the input field.

输入类型=提交：如果该按钮被用于发送的形式，值属性包含，即按钮上的文字。

input type="submit": If the button was used to send the form, the value property is included, i.e. the text of the button.

输入类型=形象：如果该按钮被用于发送的形式，对图像内的鼠标点击的坐标是在后发。名称为x和y坐标通过加入的.x和.Y的元素的名称创建

input type="image": If the button was used to send the form, the coordinates of the mouse click within the image is sent in the post. Names for the x and y coordinates are created by adding ".x" and ".y" to the name of the element.

输入类型=复选框：如果复选框被选中，值属性包含。如果元素没有值属性指定的，上的值。

input type="checkbox": If the checkbox is checked, the value property is included. If the element has no value property specified, the value "on" is used.

输入类型=无线电：在值属性包含从每个选定项目组。 （A组是具有相同名称的单选按钮。）

input type="radio": The value property is included from the selected item from each group. (A group is all radio buttons with the same name.)

输入类型=文件：将选定的文件的内容包括，随着原始文件路径（或唯一的文件名，这取决于浏览器和安全设置）。

input type="file": The content of the selected file is included, along with the original file path (or only the file name, depending on browser and security settings).

输入类型=隐藏：在值属性包含

按钮：如果该按钮被用于发送的形式，的innerText 属性包括，即与HTML标记删除的按钮上的文字。

button: If the button was used to send the form, the innerText property is included, i.e. the text of the button with any html markup removed.

A 文本框控件呈现无论是作为输入类型=文本，一个输入类型=密码或文本区域，根据文本模式属性。 A 的DropDownList 控件呈现为选择元素。 A 按钮控件呈现为输入类型=提交。 A 复选框控件呈现为输入类型=复选框。等等...查看呈现的HTML code，看看呈现实际的HTML元素。

A TextBox control is rendered either as an input type="text", an input type="password" or a textarea, depending on the TextMode property. A DropDownList control is rendered as a select element. A Button control is rendered as an input type="submit". A CheckBox control is rendered as an input type="checkbox". And so on... check the rendered html code to see what the actual html elements rendered are.

一个GridView中只包括在后的任何数据，如果它包含任何可编辑的表单字段，或者如果它导致回发（通过浏览列表为例）。当执行回发有存储在一对隐藏字段的一些信息，这样会导致回发，但本身不发送任何形式的数据（如一个LinkBut​​ton为例）任何控制会包括有关什么引起的回发信息。

A GridView only includes any data in the post if it contains any editable form fields, or if it causes a postback (by navigating in the list for example). When doing a postback there is some information stored in a pair of hidden fields, so any control that causes a postback but doesn't send any form data by itself (like a LinkButton for example) does include information about what caused the postback.

控件也可以把数据在ViewState，这是保存在一个隐藏字段的形式。这也包括在后，但它只是发送到浏览器，然后再返回，而不由浏览器被改变。

Controls may also put data in the ViewState, which is kept in a hidden field in the form. This is also included in the post, but it's just sent to the browser and back again without being changed by the browser.

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