Bind Dictionary to GridView

Question

Referring to this thread: Algorithm to count the time that occured on the same period, how to bind the dictionary to the GridView? Pls take a look to the answer.

I t

Answer 1

Here is a Gridview

    <asp:GridView ID="GV" runat="server" AutoGenerateColumns="false">
        <Columns>
            <asp:BoundField DataField="Key" HeaderText="Dictionary Key" />
            <asp:BoundField DataField="Value" HeaderText="Dictionary Value" />
        </Columns>
    </asp:GridView>

Here is code to bind a dictionary to that Gridview

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    Dim D As New Dictionary(Of Integer, String)
    D.Add(1, "One")
    D.Add(2, "Two")
    D.Add(3, "Three")
    GV.DataSource = D
    GV.DataBind()
End Sub

Here is the output

What if my Value of of some type "MyClass?"

The Gridview will execute the ToString function of MyClass, per "Value" cell.

In your example, Override the ToString function on this class

Public Class TimeRangeCounter
    Property ExactRangeMatch as Integer
    Property SubRangeMatch as Integer
End Class

This is necessary because your "Value" is of time TimeRangeCounter

Summary

The Author's code had two problems.

• Problem 1 was generating an actual error and was solved by following my code example
• Problem 2 was the lack of a ToString function for the custom class used in the "Value" column of the Gridview