首先，您需要创建一个DataList项目Templet，其中将显示数据，然后尝试此操作...

First of All you need to create a Item Templet of DataList in which data will be displayed, then try this...

If reader.Read() Then
            DataList1.DataSource = dictionary1.Tables("postcomment")
            Me.DataBind()
        Else
            DataList1.Visible = False
            nocomment.Text = "No Comments Posted"
        End If

插入了Me.DataBind()，请尝试调用
的bind方法
DataList1.DataBind()

Inseted of Me.DataBind() please try to call a bind method of

DataList1.DataBind()