我的孩子gridview中显示值的下拉列表出现问题。无论出于何种原因，行中的第一个下拉列表工作正常并显示数据库中的值，其他值不显示任何内容。
以下是我的网格视图的代码：
<asp:GridView ID="GVAccounts" runat="server" AutoGenerateColumns="False"
CellPadding="4" ForeColor="#333333"
GridLines="Horizontal"
style="position: relative; margin-top: 10px">
<AlternatingRowStyle BackColor="White" ForeColor="#284775" />
<Columns>
<asp:BoundField DataField="branch" HeaderText="Branch"
SortExpression="branch" />
<asp:BoundField DataField="no" HeaderText="Account"
SortExpression="account" />
<asp:TemplateField HeaderText="Name" SortExpression="name">
<EditItemTemplate>
<asp:TextBox ID="TextName" runat="server" Text='<%# Eval("name") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="LabelName" runat="server" Text='<%# Eval("name") + " " + Eval("surname") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="type" HeaderText="Type" SortExpression="type" />
<asp:BoundField DataField="sub" HeaderText="Sub" SortExpression="sub" />
<asp:BoundField DataField="TotalAmount" HeaderText="Hold"
SortExpression="TotalAmount" />
<asp:BoundField DataField="loc" HeaderText="LOC" DataFormatString="{0:C}" SortExpression="loc" />
<asp:BoundField DataField="locstatus" HeaderText="LOC status"
SortExpression="locstatus" />
<asp:BoundField DataField="HoldCalc" HeaderText="OD/EX Amt" SortExpression="HoldCalc" />
<asp:BoundField DataField="odtimes" HeaderText="#OD" SortExpression="odtimes" />
<asp:TemplateField>
<ItemTemplate>
<tr>
<td colspan="100%">
<div id="gridChild" style="display: inline; position: relative; left: 15px; overflow: auto">
<asp:GridView ID="gvChildGrid" runat="server" AutoGenerateColumns="false"
BorderStyle="Double" BorderColor="#5D7B9D" Width="80%">
<HeaderStyle BackColor="#5D7B9D" Font-Bold="true" ForeColor="White" />
<RowStyle BackColor="#E1E1E1" />
<AlternatingRowStyle BackColor="White" />
<HeaderStyle BackColor="#5D7B9D" Font-Bold="true" ForeColor="White" />
<Columns>
<asp:TemplateField HeaderText="Select">
<ItemTemplate>
<asp:CheckBox ID="chkSelect" runat="server" AutoPostBack="true"
oncheckedchanged="chkSelect_CheckedChanged" EnableViewState="true" />
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="effective" HeaderText="Effective"
HeaderStyle-HorizontalAlign="Left" >
<HeaderStyle HorizontalAlign="Left" />
</asp:BoundField>
<asp:BoundField DataField="desc_" HeaderText="Desc"
HeaderStyle-HorizontalAlign="Left" >
<HeaderStyle HorizontalAlign="Left" />
</asp:BoundField>
<asp:BoundField DataField="code" HeaderText="TC"
HeaderStyle-HorizontalAlign="Left" >
<HeaderStyle HorizontalAlign="Left" />
</asp:BoundField>
<asp:BoundField DataField="amount" HeaderText="Amount"
HeaderStyle-HorizontalAlign="Left" >
<HeaderStyle HorizontalAlign="Left" />
</asp:BoundField>
<asp:BoundField DataField="tracer" HeaderText="Cheq #"
HeaderStyle-HorizontalAlign="Left" >
<HeaderStyle HorizontalAlign="Left" />
</asp:BoundField>
<asp:BoundField DataField="empl" HeaderText="Empl"
HeaderStyle-HorizontalAlign="Left" >
<HeaderStyle HorizontalAlign="Left" />
</asp:BoundField>
<asp:BoundField DataField="balance" HeaderText="OD/EXT Amt"
HeaderStyle-HorizontalAlign="Left" >
<HeaderStyle HorizontalAlign="Left" />
</asp:BoundField>
<asp:TemplateField HeaderText="Note">
<ItemTemplate>
<asp:DropDownList ID="DropDownNote" runat="server"
onselectedindexchanged="DropDownNote_SelectedIndexChanged"
AutoPostBack="True">
<asp:ListItem></asp:ListItem>
<asp:ListItem>MWC</asp:ListItem>
<asp:ListItem>CBM</asp:ListItem>
<asp:ListItem>Return</asp:ListItem>
<asp:ListItem>TSF</asp:ListItem>
<asp:ListItem>OK NO S/C</asp:ListItem>
</asp:DropDownList>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Note1">
<ItemTemplate>
<asp:DropDownList ID="ddNote2" runat="server"
onselectedindexchanged="ddNote2_SelectedIndexChanged" AutoPostBack="true">
<asp:ListItem Selected="True">NSF</asp:ListItem>
<asp:ListItem>Funds Not Clear</asp:ListItem>
<asp:ListItem>Post Dated</asp:ListItem>
<asp:ListItem>Stale Dated</asp:ListItem>
<asp:ListItem>Stop Payment</asp:ListItem>
<asp:ListItem>Encoding Incorrect</asp:ListItem>
</asp:DropDownList>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Branch">
<ItemTemplate>
<asp:DropDownList ID="ddBranch" runat="server" DataSourceID="BranchDataSource"
DataTextField="branch" DataValueField="branch" AutoPostBack="true">
</asp:DropDownList>
<asp:SqlDataSource ID="BranchDataSource" runat="server"
ConnectionString="<%$ ConnectionStrings:ThirdPartyDataConnectionString %>"
SelectCommand="SELECT [branch] FROM [branch]"></asp:SqlDataSource>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Account">
<ItemTemplate>
<asp:TextBox ID="TextNo" runat="server" ></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Type">
<ItemTemplate>
<asp:DropDownList ID="ddType" runat="server" DataSourceID="typeSource"
DataTextField="Type" DataValueField="Type" AutoPostBack="true">
</asp:DropDownList>
<asp:SqlDataSource ID="typeSource" runat="server"
ConnectionString="<%$ ConnectionStrings:ThirdPartyDataConnectionString %>"
SelectCommand="SELECT [Type] FROM [DMDType]"></asp:SqlDataSource>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Sub">
<ItemTemplate><asp:TextBox ID="TextSub" Width="25px" runat="server"></asp:TextBox></ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</div>
</td>
</tr>
</ItemTemplate>
</asp:TemplateField>
</Columns>
<EditRowStyle BackColor="#999999" />
<FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" CssClass="GVFixedHeader" />
<PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
<RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
<SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
<SortedAscendingCellStyle BackColor="#E9E7E2" />
<SortedAscendingHeaderStyle BackColor="#506C8C" />
<SortedDescendingCellStyle BackColor="#FFFDF8" />
<SortedDescendingHeaderStyle BackColor="#6F8DAE" />
</asp:GridView>
以下是显示问题的方法：
Private Function CheckForSubmit() As Boolean
Try
conn = New SqlConnection(connectionString)
Dim cmdNote As New SqlCommand("select note, note1, noteBranch, noteAccountNo, noteType, noteSub, id from DmdOD where id = @id order by effective, time_, seqno_dmddmhi_dmhi", conn)
cmd = New SqlCommand("select submitted, id, effective FROM DmdOD where no = @no and entered = '" & ddDate.SelectedItem.Text & "' order by effective, time_, seqno_dmddmhi_dmhi", conn)
Dim objDBId As Object = 0
Dim id = 0
Dim objDate As Date
Dim dateStr As String = ""
If ddDate.SelectedIndex <> -1 Then
cmd = New SqlCommand("select submitted, id, entered FROM DmdOD where no = @no and entered = '" & ddDate.SelectedItem.Text & "' order by effective, time_, seqno_dmddmhi_dmhi", conn)
' cmd.Parameters.Add(New SqlParameter("effective", ddDate.SelectedItem.Text))
Else
cmd = New SqlCommand("select submitted, id, entered FROM DmdOD where no = @no order by effective, time_, seqno_dmddmhi_dmhi", conn)
End If
cmd.CommandType = CommandType.Text
Dim i = 0
For Each row As GridViewRow In GVAccounts.Rows
cmd.Parameters.Add(New SqlParameter("@no", row.Cells(1).Text))
Dim gv As GridView = DirectCast(row.FindControl("gvChildGrid"), GridView)
conn.Open()
Dim idReader As SqlClient.SqlDataReader = cmd.ExecuteReader()
'get ids in order
While (idReader.Read())
If Not objId.Contains(idReader.GetValue(1)) Then
objId.Add(idReader.GetValue(1))
End If
End While
conn.Close()
conn.Open()
Dim reader As SqlClient.SqlDataReader = cmd.ExecuteReader()
While (reader.Read())
objSubmit = reader.GetValue(0)
objDBId = reader.GetValue(1)
objDate = reader.GetValue(2)
dateStr = objDate.ToShortDateString
If dateStr = ddDate.SelectedItem.Text Then
Exit While
End If
End While
conn.Close()
If objSubmit = True And dateStr = ddDate.SelectedItem.Text Then
For Each r As GridViewRow In gv.Rows
cmdNote.Parameters.Add(New SqlParameter("@id", objId(i)))
Dim ddNote As Control = r.FindControl("DropDownNote")
Dim ddl As DropDownList = DirectCast(ddNote, DropDownList)
Dim ddNote2 As Control = r.FindControl("ddNote2")
Dim ddlNote As DropDownList = DirectCast(ddNote2, DropDownList)
ddlNote.Items.Insert(0, New ListItem(String.Empty, String.Empty))
Dim ddBranch As Control = r.FindControl("ddBranch")
Dim ddBranchBox As DropDownList = DirectCast(ddBranch, DropDownList)
ddBranchBox.Items.Insert(0, New ListItem(String.Empty, String.Empty))
Dim txtAccount As Control = r.FindControl("TextNo")
Dim txtAccountBox As TextBox = DirectCast(txtAccount, TextBox)
Dim ddType As Control = r.FindControl("ddType")
Dim ddTypeBox As DropDownList = DirectCast(ddType, DropDownList)
Dim txtSub As Control = r.FindControl("TextSub")
Dim txtSubBox As TextBox = DirectCast(txtSub, TextBox)
r.Cells(0).Enabled = False
r.Cells(8).Enabled = False
r.Cells(9).Enabled = False
r.Cells(10).Enabled = False
r.Cells(11).Enabled = False
r.Cells(12).Enabled = False
r.Cells(13).Enabled = False
'Display fields
gv.Columns(8).Visible = True
gv.Columns(9).Visible = True
gv.Columns(10).Visible = True
gv.Columns(11).Visible = True
gv.Columns(12).Visible = True
gv.Columns(13).Visible = True
ddBranchBox.Visible = True
txtAccount.Visible = True
ddTypeBox.Visible = True
txtSub.Visible = True
'Get Data for fields
conn.Open()
cmdNote.ExecuteNonQuery()
Dim readNotes As SqlClient.SqlDataReader = cmdNote.ExecuteReader()
readNotes.Read()
'Note
If IsDBNull(readNotes.GetValue(0)) Then
ddl.SelectedItem.Text = ""
Else
ddl.SelectedItem.Text = readNotes.GetValue(0)
End If
'Note1
If IsDBNull(readNotes.GetValue(1)) Then
'GVAccounts.Columns(12).Visible = False
ddlNote.Visible = False
ddlNote.SelectedItem.Text = ""
Else
'ddlNote.SelectedItem.Text = readNotes.GetValue(1)
ddlNote.SelectedItem.Selected = False
ddlNote.Items.FindByText(readNotes.GetValue(1)).Selected = True
End If
'Branch
If IsDBNull(readNotes.GetValue(2)) Then
ddBranchBox.Visible = False
ddBranchBox.SelectedItem.Text = ""
Else
ddBranchBox.SelectedItem.Text = readNotes.GetValue(2)
End If
'Account
If IsDBNull(readNotes.GetValue(3)) Then
txtAccountBox.Visible = False
txtAccountBox.Text = ""
Else
txtAccountBox.Text = readNotes.GetValue(3)
End If
'Type
If IsDBNull(readNotes.GetValue(4)) Then
ddTypeBox.Visible = False
ddTypeBox.SelectedItem.Text = ""
Else
ddTypeBox.SelectedItem.Text = readNotes.GetValue(4)
End If
'Sub
If IsDBNull(readNotes.GetValue(5)) Then
txtSubBox.Visible = False
txtSubBox.Text = ""
Else
txtSubBox.Text = readNotes.GetValue(5)
End If
conn.Close()
i += 1
cmdNote.Parameters.Clear()
Next
ButtonSubmit.Enabled = False
ButtonSave.Enabled = False
ButtonSaveTop.Enabled = False
End If
i = 0
'cmd.Parameters.Clear()
'cmdNote.Parameters.Clear()
objSubmit = False
dateStr = ""
cmd.Parameters.RemoveAt(0)
cmdNote.Parameters.Clear()
objId.Clear()
Next
If objSubmit = True Then
Return objSubmit
End If
Catch ex As Exception
LblErr.ForeColor = Drawing.Color.DarkRed
LblErr.Text = "CheckForSubmit - " & ex.Message
Finally
conn.Dispose()
End Try
Return Nothing
End Function
编辑：我还应该注意，当我单步执行代码时，我看到下拉列表实际上有值，但在gridview上没有显示任何内容，我很难过。
答案 0 :(得分：1)
更新回答
我会比较下拉列表和＃34;注意＆＃34;和＆＃34; note1＆＃34;
e.g。注意有效，但note1没有。
我可以在2之间看到的区别是，音符有一个空的列表项。尝试将空列表项添加到注释1。
如果失败，请从note中复制工作代码，然后逐步将其替换为Note1中的值，检查是否/何时失败。