invalidoperationexception

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How do I prevent InvalidOperationException saving a cyclic graph of entities?

Given the entities, class A { B DefaultB { get; set; } C DefaultC { get; set; } } class B { A { get; set; }[详细]

2023-04-13 07:47 分类：问答
InvalidOperationException Occurred in Linq orderby clause

Here is the linq statement I am using: var sortedList = (from p in OriginalList where p.NValue != null orderby Math.Abs(p.NValue.Value) descending[详细]

2023-04-10 22:57 分类：问答
Silverlight InvalidOperationException when clicking a link

I have a dynamically generated hyperlink which when clicked should open a lotus notes document. I do it using the code below.[详细]

2023-04-10 18:51 分类：问答
webmethod with optional C# arguments appear to be required when invoked as a RESTful URI - gives InvalidOperationException: Missing parameter

I have a webmethod which works and I\'ve added some optional parameters (because I don\'t want to burden all callers with providing these values; they are primarily for my development needs since my w[详细]

2023-04-09 05:07 分类：问答
DataGrid 'EditItem' is not allowed for this view when dragging multiple items

I have a datagrid which gets data like this: public struc开发者_开发技巧t MyData { public string name { set; get; }[详细]

2023-03-26 04:50 分类：问答
Linq to CRM - Invalid operation exception

I\'m using a LINQ to CRM from Advanced Developer Extension for MS CRM 4.0. It works fine with direct queries. But I\'ve got a problem when query looks like this:[详细]

2023-03-25 01:30 分类：问答
Invoke or BeginInvoke cannot be called on a control until the window handle has been created

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing;[详细]

2023-03-18 04:51 分类：问答
Binary Expression Class throws Invalid Operation Exception on Comparison Operators

I am modifying an open source program to create a generic filter for a datagrid in Silverlight.The code for the class is shown below.[详细]

2023-03-16 18:56 分类：问答
InvalidOperationException: Invalid attempt to read when no data is present. (SQL)

void ExecuteContent() { StringBuilder sb = new StringBuilder(); sb.Append(\"SELECT TOP 1 @UsersI开发者_JS百科D,u.Avatar,t.Date, u.Name, t.ThreadTitle, t.ThreadParagraph\");[详细]

2023-03-12 23:02 分类：问答
Queue ForEach loop throwing InvalidOperationException

I haven\'t used Queues<T> to any real degree before, so I might be missing something obvious. I\'m trying to iterate through a Queue<EnemyUserControl> like this (every frame):[详细]

2023-03-10 03:14 分类：问答