我正在尝试学习如何将总数放在我的gridview上，并且已经搜索了2天来找到我的无法工作的原因。 onrowdatabound事件触发，但它不会将行识别为数据行，它只会拾取页脚（我添加了一个文本框并将值放入以确保我没有丢失它）。我对此非常陌生，我可能做错了很简单。
我的代码隐藏是
Protected Sub WeeklyGridView_RowDataBound(ByVal sender As Object, _
ByVal e As GridViewRowEventArgs) Handles WeeklyGridView.OnRowDataBound
Dim appleTotal As Integer = 0
Dim orangeTotal As Integer = 0
Dim bananaTotal As Integer = 0
Dim pearTotal As Integer = 0
Dim grapeTotal As Integer = 0
Dim peachTotal As Integer = 0
Dim cherryTotal As Integer = 0
Dim pineTotal As Integer = 0
Dim totalTotal As Integer = 0
Dim ThedataType As String
ThedataType = e.Row.RowType.ToString
TextBox1.Text = ThedataType 'this always shows Footer
If e.Row.RowType = DataControlRowType.DataRow Then 'this never fires
appleTotal += Convert.ToInt32(DataBinder.Eval(e.Row.DataItem, "Apple"))
orangeTotal += Convert.ToInt32(DataBinder.Eval(e.Row.DataItem, _
"Orange"))
bananaTotal += Convert.ToInt32(DataBinder.Eval(e.Row.DataItem, _
"Banana"))
pearTotal += Convert.ToInt32(DataBinder.Eval(e.Row.DataItem, _
"Pear"))
grapeTotal += Convert.ToInt32(DataBinder.Eval(e.Row.DataItem, _
"Grape"))
peachTotal += Convert.ToInt32(DataBinder.Eval(e.Row.DataItem, _
"Peach"))
cherryTotal += Convert.ToInt32(DataBinder.Eval(e.Row.DataItem, _
"Cherry"))
pineTotal += Convert.ToInt32(DataBinder.Eval(e.Row.DataItem, _
"Pine"))
totalTotal += Convert.ToInt64(DataBinder.Eval(e.Row.DataItem, _
"TOTAL"))
ElseIf e.Row.RowType = DataControlRowType.Footer Then 'this always fires
e.Row.Cells(0).Text = "Totals:"
' for the Footer, display the running totals
e.Row.Cells(3).Text = appleTotal.ToString("g")
e.Row.Cells(4).Text = orangeTotal.ToString("g")
e.Row.Cells(5).Text = bananaTotal.ToString("g")
e.Row.Cells(6).Text = pearTotal.ToString("g")
e.Row.Cells(7).Text = grapeTotal.ToString("g")
e.Row.Cells(8).Text = peachTotal.ToString("g")
e.Row.Cells(9).Text = cherryTotal.ToString("g")
e.Row.Cells(10).Text = pineTotal.ToString("g")
e.Row.Cells(11).Text = totalTotal.ToString("g")
e.Row.Font.Bold = True
End If
End Sub
gridview会根据用户选择的条件进行更新，并在点击搜索按钮时显示并填充。
搜索按钮的荒谬代码是:(我知道这很糟糕，但我正在尝试）
Protected Sub SearchButton_Click(sender As Object, e As ImageClickEventArgs) Handles SearchButton.Click
Dim wherecls As String = "trees in ("
Dim whereFNcls As String = "fruitNumber between ("
Dim whereString As String = ""
Dim i As Integer = 0
Dim selectQry As String = "SELECT cast(trees as varchar(3)) as Trees, MIN(fruitnumber) AS FN_Start, MAX(fruitnumber) AS FN_End, COUNT(CASE WHEN fruitType = 'apple' THEN 1 ELSE NULL END) AS apple, COUNT(CASE WHEN fruitType = 'orange' THEN 1 ELSE NULL END) AS orange, COUNT(CASE WHEN fruitType = 'banana' THEN 1 ELSE NULL END) AS banana, COUNT(CASE WHEN fruitType = 'pear' THEN 1 ELSE NULL END) AS pear, COUNT(CASE WHEN fruitType = 'grape' THEN 1 ELSE NULL END) AS grape, COUNT(CASE WHEN fruitType = 'peach' THEN 1 ELSE NULL END) AS peach, COUNT(CASE WHEN fruitType = 'cherry' THEN 1 ELSE NULL END) AS cherry, COUNT(CASE WHEN fruitType = 'pine' THEN 1 ELSE NULL END) AS pine, COUNT(CASE when dcosg is not null THEN 1 ELSE NULL END) AS Total FROM fruitReport WHERE (orchard = @orchard) and "
orchardTextBox.Text = orchardDropDown.SelectedValue
' check if items selected in both listboxes
If trees_Listbox.Items.Count > 0 Then
If fruitminListBox.Items.Count > 0 Then
'cycle through items in fruitnum listbox to create an "in" clause for sql query
For Each item As ListItem In trees_Listbox.Items
whereString += String.Join(",", item) + ", "
Next
whereString = Left(whereString, Len(whereString) - 2) + ")"
selectQry += "(" + wherecls + whereString + ")"
whereFNcls = "(fruitNumber between "
For Each itemFNmin As ListItem In fruitminListBox.Items
'create a "between" clause for the min and max FN values entered by user.
whereOEcls += itemFNmin.Value + " and " + fruitmaxListBox.Items(i).ToString + ") or (fruitNumber between " '(fruitnumber between number and number) or
i += 1
Next
'trim off the last text portion of the whereOEcls
whereOEcls = Left(whereOEcls, Len(whereFNcls) - 25)
selectQry += " and (" + whereFNcls + ") GROUP BY trees ORDER BY trees"
fruityData.SelectCommand = selectQry
WeeklyGridView.Visible = True
Else
'see if FN is empty but trees is selected
For Each item As ListItem In trees_Listbox.Items
whereString += String.Join(",", item) + ", "
Next
whereString = Left(whereString, Len(whereString) - 2)
selectQry += wherecls + whereString + ") GROUP BY trees ORDER BY trees"
fruityData.SelectCommand = selectQry
WeeklyGridView.Visible = True
End If
Else
If fruitminListBox.Items.Count > 0 Then
'check if trees is empty but FN is selected
whereFNcls = "(fruitNumber between "
For Each itemFNmin As ListItem In fruitminListBox.Items
'create a "between" clause for the min and max FN values entered by user.
whereFNcls += itemFNmin.Value + " and " + fruitmaxListBox.Items(i).ToString + ") or (fruitNumber between " '(fruitnumber between number and number) or
i += 1
Next
whereFNcls = Left(whereFNcls, Len(whereFNcls) - 26)
selectQry += whereFNcls + ") GROUP BY trees ORDER BY trees"
fruityData.SelectCommand = selectQry
WeeklyGridView.Visible = True
Else
'if both are empty search only on orchard
selectQry = Left(selectQry, Len(selectQry) - 5) + " group by trees order by trees"
fruityData.SelectCommand = selectQry
WeeklyGridView.Visible = True
End If
End If
End Sub
最后，我的gridview是......
<asp:GridView ID="WeeklyGridView" runat="server" HorizontalAlign="Center" DataSourceID="fruityData" AutoGenerateColumns="False" BackColor="White" BorderColor="#999999" BorderStyle="None" BorderWidth="1px" CellPadding="3" GridLines="Vertical" Visible="False" ShowFooter="True" ShowHeaderWhenEmpty="True">
<AlternatingRowStyle BackColor="#DCDCDC" />
<Columns>
<asp:BoundField DataField="trees" HeaderText="trees" SortExpression="trees" />
<asp:BoundField DataField="FN_Start" HeaderText="FN_Start" SortExpression="FN_Start" ReadOnly="True" />
<asp:BoundField DataField="FN_End" HeaderText="FN_End" SortExpression="FN_End" ReadOnly="True" />
<asp:BoundField DataField="apple" HeaderText="apple" SortExpression="apple" ReadOnly="True" />
<asp:BoundField DataField="orange" HeaderText="orange" SortExpression="orange" ReadOnly="True" />
<asp:BoundField DataField="banana" HeaderText="banana" SortExpression="banana" ReadOnly="True" />
<asp:BoundField DataField="pear" HeaderText="pear" SortExpression="pear" ReadOnly="True" />
<asp:BoundField DataField="grape" HeaderText="grape" SortExpression="grape" ReadOnly="True" />
<asp:BoundField DataField="peach" HeaderText="peach" SortExpression="peach" ReadOnly="True" />
<asp:BoundField DataField="cherry" HeaderText="cherry" SortExpression="cherry" ReadOnly="True" />
<asp:BoundField DataField="pine" HeaderText="pine" SortExpression="pine" ReadOnly="True" />
<asp:BoundField DataField="TOTAL" HeaderText="TOTAL" SortExpression="TOTAL" ReadOnly="True" />
</Columns>
<FooterStyle BackColor="#CCCCCC" ForeColor="Black" />
<HeaderStyle BackColor="#000084" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#999999" ForeColor="Black" HorizontalAlign="Center" />
<RowStyle BackColor="#EEEEEE" ForeColor="Black" />
<SelectedRowStyle BackColor="#008A8C" Font-Bold="True" ForeColor="White" />
<SortedAscendingCellStyle BackColor="#F1F1F1" />
<SortedAscendingHeaderStyle BackColor="#0000A9" />
<SortedDescendingCellStyle BackColor="#CAC9C9" />
<SortedDescendingHeaderStyle BackColor="#000065" />
</asp:GridView>
<asp:SqlDataSource ID="fruityData" runat="server" ConnectionString="<%$ ConnectionStrings:fruityStuff %>" >
<SelectParameters>
<asp:ControlParameter ControlID="orchardTextBox" DefaultValue="theGrove" Name="orchard" PropertyName="Text" Type="String" />
</SelectParameters>
</asp:SqlDataSource>
非常感谢任何和所有帮助。
答案 0 :(得分：0)
在您分配WeeklyGridView.DataBind()后，您无法致电SqlDataSource.SelectCommand。试试这个：
fruityData.SelectCommand = selectQry
fruityData.DataBind()
答案 1 :(得分：0)
我知道这是愚蠢的事。我在事件处理程序中定义了变量。我应该这样做。
Dim appleTotal As Integer = 0
Dim orangeTotal As Integer = 0
Dim bananaTotal As Integer = 0
Dim pearTotal As Integer = 0
Dim grapeTotal As Integer = 0
Dim peachTotal As Integer = 0
Dim cherryTotal As Integer = 0
Dim pineTotal As Integer = 0
Protected Sub WeeklyGridView_RowDataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs) Handles WeeklyGridView.OnRowDataBound