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//SelectUtilitiesCheckbox is bound to a complete list of the Utilitie_companies table
foreach (ListItem x in SelectUtilitiesCheckBox.Items)
{
    Select_Utility SU = rows.Where(r => r.Utility_Id == Convert.ToInt32(x.Value)).FirstOrDefault();
    bool initialValue = SU != null;

    if (x.Selected == true && initialValue == false)
    {
        // New qualification added so save it
        Select_Utility NewSelectUtility = new Select_Utility();
        NewSelectUtility.WorkId = tempWorkSiteId;
        NewSelectUtility.Utility_Id = System.Convert.ToInt32(x.Value);

        context.Select_Utilities.InsertOnSubmit(NewSelectUtility);
    }
    else if (x.Selected == false && initialValue == true)
    {
        // Removed old qualification so remove it in the database
        context.Select_Utilities.DeleteOnSubmit(SU);
    }
}

context.SubmitChanges();

我的 Q 是 - 使用 LINQ - 提交时插入工作正常，但是当我尝试使用 deleteOnSubmit 时，我得到一个

错误：用户代码未处理 ChangeConflictEception - 未找到或更改行。

当它到达 context.submit 但在 context.Select_Utilities.DeleteOnSubmit(SU) 中使用断点“Su”; 包含要删除的正确记录

关于为什么的任何想法？

4

1 回答 1

3

Thanks to...

System.Data.Linq.ChangeConflictException: Row not found or changed

I have solved the issue.

The problem being: one of my fields in the Db was nullable but not nullable in the DBML file. Changing records to suit solved the issue.

于 2013-03-08T10:57:53.227 回答