Caml查询不适用于视图创建共享点

Question

I am creating a Sharepoint List View using C# CSOM code. I'm using ViewCreationInformation to create my view. I'm facing problem in writing the query for it.

Writing this works:

            ViewCollection viewColl = list.Views;
            string[] viewFields = {"Id", "Action", "Created", "Created By"};
            ViewCreationInformation creationInfo = new ViewCreationInformation();
            creationInfo.Title = "FromCode";
            creationInfo.ViewFields = viewFields;
            creationInfo.Query = @"<Where><Neq><FieldRef Name=""ConfidentialDocument""/><Value Type=""Choice"">No</Value></Neq></Where><GroupBy><FieldRef Name=""TemplateName"" /><FieldRef Name=""Title"" /></GroupBy><OrderBy><FieldRef Name=""Created"" Ascending=""True"" /></OrderBy>";
            creationInfo.ViewTypeKind = ViewType.Html;
            creationInfo.RowLimit = 30;
            creationInfo.Paged = true;
            creationInfo.SetAsDefaultView = true;
            viewColl.Add(creationInfo);

But If I change the query to this:

            creationInfo.Query = @"<Where><Neq><FieldRef Name=""ConfidentialDocument""/><Value Type=""Choice"">No</Value></Neq></Where><GroupBy Collapse=""TRUE"" GroupLimit=""30""><FieldRef Name=""TemplateName"" /><FieldRef Name=""Title"" /></GroupBy><OrderBy><FieldRef Name=""Created"" Ascending=""True"" /></OrderBy>";

Then the View displays an error: TypeError: Unable to get property 'substring' of undefined or null reference

You can check the link or here is the error: TypeError: Unable to get property 'substring' of undefined or null reference

  TypeError: Unable to get property 'substring' of undefined or null referenceTypeError: Unable to get property '_events' of undefined or null reference 

Does anyone have any idea about this? I've searched many places and I found similar codes everywhere. I don't know why this code is not working.

Answer 1

Ok the problem was with GroupLimit=""30"". Query without GroupLimit works totally fine.

        creationInfo.Query = @"<Where><Neq><FieldRef Name=""ConfidentialDocument""/><Value Type=""Choice"">No</Value></Neq></Where><GroupBy Collapse=""TRUE""><FieldRef Name=""TemplateName"" /><FieldRef Name=""Title"" /></GroupBy><OrderBy><FieldRef Name=""Created"" Ascending=""True"" /></OrderBy>";