PagesSection.RenderAllHiddenFieldsAtTopOfForm Property
Gets or sets a value that indicates whether all system-generated hidden fields are rendered at the top of the form.
Namespace: System.Web.Configuration
Assembly: System.Web (in System.Web.dll)
[ConfigurationPropertyAttribute("renderAllHiddenFieldsAtTopOfForm", DefaultValue = true)] public bool RenderAllHiddenFieldsAtTopOfForm { get; set; }
Property Value
Type: System.Booleantrue if system-generated hidden fields are rendered at the top of the form; otherwise, false. The default is true.
You can use the RenderAllHiddenFieldsAtTopOfForm property to specify that some system-generated hidden fields are rendered at the end of the form.
In versions of ASP.NET earlier than the .NET Framework 3.5 SP1, ASP.NET renders some hidden fields (for example, __VIEWSTATE) at the top of the form. Other hidden fields (for example, __EVENTVALIDATION) are rendered near the bottom of the form, just before the closing </div> tag. By default, in ASP.NET 3.5 SP1, all system-generated hidden fields are rendered at the top of the page. This makes sure that the information in these fields is sent to the server even if a postback is performed before the page has finished loading. If RenderAllHiddenFieldsAtTopOfForm is set to false, performing a postback before the page has finished loading can cause an "Invalid postback or callback argument" error.
 Note |
|---|
Although the property name indicates "all hidden fields," user-created hidden fields are not affected by settings for this property. |
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
