NET Framework 4.8, it returns null by default, but you can opt in to return the member name instead. NET Framework October 2019 Preview of Quality Rollup for. NET Framework 4.8 version prior to the October 2019 update, it returns the member name. NET Framework 4.7.2 and earlier versions, when using a custom, the ValidationContext.MemberName property returns null. This behavior can also be explicitly controlled with an appSetting: ĪSP.NET ValidationContext.MemberName is not NULL when using custom DataAnnotations.ValidationAttribute Details When targeting previous framework versions or not using targetFrameworkVersion, trailing delimiters for some values are still returned. NET Framework 4.8 or later by using the targetFrameworkVersion element, the default behavior changes to strip delimiters. NET Framework 4.8 or later versions correctly parse multipart data, so form values are available during request execution. NET Framework 4.7.2 and earlier versions, ASP.NET might incorrectly parse multipart boundary values, resulting in form data being unavailable during request execution. NameĪSP.NET Incorrect multipart handling may result in lost form data. Setting it lower, or not at all, preserves the old incorrect behavior. Suggestionįor the correct behavior for restoring attributes on postback, set the targetFrameworkVersion to 4.8 or higher. NET Framework 4.8 or later versions, they are preserved after postback. NET Framework 4.7.2 and earlier versions, CheckBox.InputAttributes and CheckBox.LabelAttributes that are programmatically added to a WebForms CheckBox control are lost after postback. NET Framework 4.8 and 4.8.1.NET Framework 4.8 ASP.NET ASP.NET Fix handling of InputAttributes and LabelAttributes for WebForms CheckBox control Detailsįor applications that target. This article lists the app compatibility issues that were introduced in.
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