Question

我的项目目的需要帮助。我正在使用gridview。其中我试图动态插入一些列。由于这些列依赖于不同的参数，因此在填充网格时将插入不同的列。为此，每当我第二次填充网格时，我将删除旧的动态添加列并添加新列。但是我正在第二次填充网格。下面是我用来动态分配和删除列的代码。

//delete old columns
            foreach (string approvalUser in tempSchemaList)
            {
                if (((GridViewDataColumn)dgEng.Columns[approvalUser]) != null)
                 dgEng.Columns.Remove((GridViewDataColumn)dgEng.Columns[approvalUser])
            }


            //inserting new columns

foreach (string approvalUser in approverUsers)
                {


GridViewDataColumn datacolumn = new GridViewDataColumn();
                    datacolumn.Header = approvalUser;
                    datacolumn.UniqueName = approvalUser;
                    datacolumn.SortingState = SortingState.Ascending; 
                    datacolumn.DataMemberBinding = new System.Windows.Data.Binding(“ab”);

                    Interaction.GetBehaviors(datacolumn).Add(new ClosePopupOnApplyFilterBehavior());
                    dgEng.Columns.Insert(insertIndex, datacolumn);
                    insertCount++;
                    insertIndex++;
                }
            }

在第二次填充网格时，我收到以下错误：

Line: 57
Error: Unhandled Error in Silverlight Application 
Code: 4004    
Category: ManagedRuntimeError       
Message: System.Collections.Generic.KeyNotFoundException: The given key was not present in the dictionary.
   at System.ThrowHelper.ThrowKeyNotFoundException()
   at System.Collections.Generic.Dictionary`2.get_Item(TKey key)
   at System.Windows.ResourceManagerWrapper.GetResourceForUri(Uri xamlUri, Type componentType)

请说明错误以及该怎么做？

Silverlight 4004未处理异常

0 个答案: