参考这个线程：计算同一时期发生的时间的算法，如何将字典绑定到GridView？请看一下答案。
我试图添加一个 GridView 然后在代码隐藏上：GV.DataSource = timeRangeCounts并绑定它，但作为回报：
The data source for GridView with id 'GV' did not have any properties or attributes from which to generate columns. Ensure that your data source has content.
我怎样才能做到这一点？请看下面的代码：
第一个辅助类用于保存精确匹配和子范围匹配的计数：
Public Class TimeRangeCounter
Property ExactRangeMatch as Integer
Property SubRangeMatch as Integer
End Class
第二个辅助类用于帮助字典了解一个键（类型TimeRange）与另一个键的不同之处：
Public Class TimeRangeEqualityComparer
Implements IEqualityComparer(Of TimeRange)
Public Overloads Function Equals(left As TimeRange, right As TimeRange) _
As Boolean Implements IEqualityComparer(Of TimeRange).Equals
Return left.ToString = right.ToString
End Function
Public Overloads Function GetHashCode(range As TimeRange) _
As Integer Implements IEqualityComparer(Of TimeRange).GetHashCode
return range.ToString().GetHashCode()
End Function
End Class
第三个助手类存储范围的开始和结束时间：
Public Class TimeRange
Private readonly _start
Private readonly _end
Public Readonly Property Start
Get
return _start
End Get
End Property
Public Readonly Property [End]
Get
return _end
End Get
End Property
Public Sub New(start As String, [end] As string)
Me._start = start
Me._end = [end]
End Sub
Public Overrides Function ToString() as String
Return String.Format("{0}-{1}", Start, [End])
End Function
End Class
所以使用上面我们应该可以写出这个算法：
Dim columnLength As Integer = 5
Dim timeStart() As String = {"08.00", "08.00", "10.00", "08.00", "08.00"}
Dim timeEnd() As String = {"08.50", "11.50", "11.00", "09.00", "08.50"}
Dim comparer As New TimeRangeEqualityComparer()
Dim timeRangeCounts As New Dictionary(Of TimeRange, TimeRangeCounter)(comparer)
'Count exact range matches while building dictionary
For i = 0 to columnLength - 1
Dim key As TimeRange = New TimeRange(timeStart(i), timeEnd(i))
If timeRangeCounts.ContainsKey(key)
timeRangeCounts(key).ExactRangeMatch += 1
Else
Dim counter = New TimeRangeCounter()
counter.ExactRangeMatch = 1
timeRangeCounts(key) = counter
End If
Next
'Count sub ranges
For Each kvp in timeRangeCounts
For Each key in timeRangeCounts.Keys
If kvp.key.Start >= key.Start AndAlso _
kvp.Key.End <= key.End AndAlso _
kvp.key.ToString <> key.ToString then
kvp.Value.SubRangeMatch += 1
End If
Next
Next
'Console.WriteLine(timeRangeCounts)
GV.DataSource = timeRangeCounts
GV.DataBind()
网格视图：
<asp:GridView ID="GV" runat="server">
<Columns>
<asp:BoundField DataField="Key" HeaderText="Dictionary Key" />
<asp:BoundField DataField="Value" HeaderText="Dictionary Value" />
</Columns>
</asp:GridView>
然后我尝试运行它，但结果如下：
Dictionary Key Dictionary Value
08:00:00-08:50:00 TimeRangeCounter
08:00:00-09:40:00 TimeRangeCounter
10:00:00-11:40:00 TimeRangeCounter
... ...
代码有什么问题？
