ASP.NET:压缩 ViewState [英] ASP.NET: Compress ViewState

问题描述

压缩 ASP.NET ViewState 内容的最新和最好的方法是什么?

What are the latest and greatest ways to compress the ASP.NET ViewState content?

这个性能怎么样?保持页面快速并尽量减少数据流量是否值得?

What about the performance of this? Is it worth it to keep the pages quick and minimize data-traffic?

我该如何制作:

<input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" 
value="/wEPDwUKMTM4Mjc3NDEyOWQYAQUeX19Db250cm9sc1JlcXVpcmVQb3N0QmFja0tleV9fFgkFLGN0b
DAwJENvbnRlbnRQbGFjZUhvbGRlcl9NYWluQ29udGVudCRSYWRCdXQxBSxjdGwwMCRDb250ZW50UGxhY2VIb
2xkZXJfTWFpbkNvbnRlbnQkUmFkQnV0MQUsY3RsMDAkQ29udGVudFBsYWNlSG9sZGVyX01haW5Db250ZW50J
FJhZEJ1dDIFLGN0bDAwJENvbnRlbnRQbGFjZUhvbGRlcl9NYWluQ29udGVudCRSYWRCdXQyBSxjdGwwMCRDb
250ZW50UGxhY2VIb2xkZXJfTWFpbkNvbnRlbnQkUmFkQnV0MwUsY3RsMDAkQ29udGVudFBsYWNlSG9sZGVyX
01haW5Db250ZW50JFJhZEJ1dDQFLGN0bDAwJENvbnRlbnRQbGFjZUhvbGRlcl9NYWluQ29udGVudCRSYWRCd
XQ0BSxjdGwwMCRDb250ZW50UGxhY2VIb2xkZXJfTWFpbkNvbnRlbnQkUmFkQnV0NQUsY3RsMDAkQ29udGVud
FBsYWNlSG9sZGVyX01haW5Db250ZW50JFJhZEJ1dDXz21BS0eJ7991pzjjj4VXbs2fGBw==" />

变成这样:

<input type="hidden" name="__VIEWSTATE"  id="__VIEWSTATE" 
value="/wEPDwUKMTM4Mjc3N==" />

推荐答案

再次，在对此进行一些研究之后，我在一篇关于 压缩视图状态.

Again, after some research into this I summarized my findings in a blog-post about Compressing View State.

为了保存压缩的视图状态，我是这样做的:

To save a compressed View State, this is what I did:

protected override void SavePageStateToPersistenceMedium(object state) {
    SaveCompressedPageState(state);
}

private void SaveCompressedPageState(object state) {
    byte[] viewStateBytes;
    using(MemoryStream stream = new MemoryStream()) {
        ObjectStateFormatter formatter = new ObjectStateFormatter();
        formatter.Serialize(stream, state);
        viewStateBytes = stream.ToArray();
    }

    byte[] compressed = CompressionHelper.Compress(viewStateBytes);
    string compressedBase64 = Convert.ToBase64String(compressed);

    ClientScript.RegisterHiddenField(ViewStateFieldName, compressedBase64);
}

对于加载部分，这段代码对我有用:

And for the loading-part, this code made it work for me:

protected override object LoadPageStateFromPersistenceMedium() {
    return LoadCompressedPageState();
}

private object LoadCompressedPageState() {
    string viewState = Request.Form[ViewStateFieldName];
    if(string.IsNullOrEmpty(viewState)) {
        return string.Empty;
    }

    byte[] decompressed = CompressionHelper.Decompress(viewState);
    string decompressedBase64 = Convert.ToBase64String(decompressed);

    ObjectStateFormatter formatter = new ObjectStateFormatter();
    return formatter.Deserialize(decompressedBase64);
}

这篇关于ASP.NET:压缩 ViewState的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！