updatepanel中的工具导致完全回发asp.net c#
我的在线订单有问题，我把我所有的下拉列表和按钮都放在updatepanel中，但是当我在下拉列表中选择某个内容时，或者当我按下按钮整页发回时…请帮助我！这是我的代码：`updatepanel中的工具导致完全回发asp.net c#,c#,asp.net,triggers,postback,html-select,C#,Asp.net,Triggers,Postback,Html Select,我的在线订单有问题，我把我所有的下拉列表和按钮都放在updatepanel中，但是当我在下拉列表中选择某个内容时，或者当我按下按钮整页发回时…请帮助我！这是我的代码：` <strong><asp:ImageButton ID="btnExcel0" runat="server" AlternateText="Export to Excel" Heigh
<strong><asp:ImageButton
ID="btnExcel0" runat="server" AlternateText="Export to Excel" Height="30px"
ImageUrl="/images/excel_icon1.png" onclick="btnExcel_Click" TabIndex="14" />
</strong>
<input type="image" runat ="server" id ="Image1" src ="/images/images.jpg" onclick="javascript:CallPrint('divPivot1')" title="Print" />
<br />
<div id= "divPivot1">
<asp:GridView ID="OrderGridView" runat="server" AllowPaging="True"
BorderStyle="None" CellPadding="3" DataKeyNames="Article"
EmptyDataText=""No product added..."" Font-Size="Small" HorizontalAlign="Left"
OnPageIndexChanging="OrderGridView_PageIndexChanging" PageSize="20"
TabIndex="15" Width="866px" BackColor="White" BorderColor="#CCCCCC"
BorderWidth="1px">
<FooterStyle BackColor="White" ForeColor="#336699" />
<HeaderStyle BackColor="#336699" Font-Bold="True" ForeColor="White" />
<PagerSettings FirstPageText="First" LastPageText="Last" />
<PagerStyle BackColor="White" ForeColor="#336699" HorizontalAlign="Left" />
<RowStyle ForeColor="#336699" Font-Size="Small" />
<SelectedRowStyle BackColor="#669999" Font-Bold="True" ForeColor="White" />
<SortedAscendingCellStyle BackColor="#F1F1F1" />
<SortedAscendingHeaderStyle BackColor="#007DBB" />
<SortedDescendingCellStyle BackColor="#CAC9C9" />
<SortedDescendingHeaderStyle BackColor="#00547E" />
<Columns>
<asp:TemplateField HeaderText="Delete" ItemStyle-HorizontalAlign="Center" >
<ItemTemplate>
<asp:CheckBox ID="CheckBox1" runat="server" />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Update Quantity" ItemStyle-HorizontalAlign="Center" ItemStyle-Width="80">
<ItemTemplate>
<asp:TextBox ID="TextBox" runat="server" Width="90" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
br />
<br />
<asp:Label ID="lblsum" runat="server" CssClass="style19" Text="Sum Total"></asp:Label>
<br />
<asp:Label ID="sum" runat="server" CssClass="style19"></asp:Label>
<br />
</div>
<strong><asp:ImageButton ID="btnDelete" runat="server" Height="28px"
ImageUrl="/images/bt_Delete.jpg" onclick="btnDelete_Click"
OnClientClick="return DeleteConfirmation();" TabIndex="13" Width="106px" />
</strong> <asp:ImageButton ID="btnUpdate"
runat="server" Height="28px" ImageUrl="/images/btUpdate.jpg" Width="106px"
OnClientClick="return UpdateConfirmation();"
onclick="btnUpdate_Click" />
<asp:TextBox ID="username" runat="server" Height="16px" Visible="False"
Width="128px"></asp:TextBox>
<br />
<asp:Label ID="Label16" runat="server" Text="Notes:" ForeColor="#336699"></asp:Label>
<br />
<asp:TextBox ID="TextBox5" runat="server" Height="101px" TabIndex="10"
TextMode="MultiLine" Width="860px"></asp:TextBox>
<br />
<asp:ImageButton
ID="btnSend" runat="server" ImageUrl="/images/mail2.jpg"
onclick="Button1_Click" AlternateText="Send your Order"
TabIndex="11" Height="75px" Width="90px"/><strong><asp:ImageButton
ID="ImageButton1" runat="server" Height="66px"
ImageUrl="/images/logout.png" Width="56px"
onclick="ImageButton1_Click" />
</strong>
<br />
<strong>
<asp:Label ID="Label18" runat="server" style="color: #336699"
Text="*Delete Product from List: Check the products which you want to remove from your list and press the delete button."></asp:Label>
</strong>
</ContentTemplate>
<Triggers>
<asp:PostBackTrigger ControlID="btnExcel0" />
<asp:AsyncPostBackTrigger ControlID="ImageButton1" />
<asp:AsyncPostBackTrigger ControlID="code" EventName="SelectedIndexChanged" />
<asp:AsyncPostBackTrigger ControlID="type" EventName="SelectedIndexChanged" />
<asp:AsyncPostBackTrigger ControlID="p" EventName="SelectedIndexChanged" />
<asp:AsyncPostBackTrigger ControlID="dem" EventName="SelectedIndexChanged" />
<asp:AsyncPostBackTrigger ControlID="quant" EventName="TextChanged" />
<asp:AsyncPostBackTrigger ControlID="btnAdd" />
<asp:AsyncPostBackTrigger ControlID="btnDelete" />
<asp:AsyncPostBackTrigger ControlID="btnUpdate" />
<asp:AsyncPostBackTrigger ControlID="btnSend" />
</Triggers>
</asp:UpdatePanel>`
br/>
`
因此，请确保您没有这样做，并上传完整的代码。这是我的下拉列表之一。我不知道为什么，但我无法上传完整的代码。。。。我有4个下拉列表，updatepanel内有4个按钮和一个gridview。正如我所说，您的下拉列表包含两个内容，即AutoPostBack=true和选定索引上的事件已更改，因此您需要删除它们以避免回发。您是否在dropdownlist的选定索引更改事件内执行任何操作？受保护的无效代码\u SelectedIndexChanged（对象发送者，事件参数e）{p.Items.Clear（）；p.Items.Add（新列表项（--Select p-->））；type.AppendDataBoundItems=true；OrdersDataContext db=new OrdersDataContext（）；var selectType=（从db.typeTs中的t开始，其中（t.codeId==Convert.ToInt32（code.SelectedItem.Value））选择t.OrderBy（t=>t.type）；type.DataSource=selectType；type.DataTextField=“type”；type.DataValueField=“id”；type.DataBind（）；if（type.Items.Count>2）{type.Enabled=true；}否则{type.Enabled=false；dem.Enabled=false；}}
<strong><asp:ImageButton
ID="btnExcel0" runat="server" AlternateText="Export to Excel" Height="30px"
ImageUrl="/images/excel_icon1.png" onclick="btnExcel_Click" TabIndex="14" />
</strong>
<input type="image" runat ="server" id ="Image1" src ="/images/images.jpg" onclick="javascript:CallPrint('divPivot1')" title="Print" />
<br />
<div id= "divPivot1">
<asp:GridView ID="OrderGridView" runat="server" AllowPaging="True"
BorderStyle="None" CellPadding="3" DataKeyNames="Article"
EmptyDataText=""No product added..."" Font-Size="Small" HorizontalAlign="Left"
OnPageIndexChanging="OrderGridView_PageIndexChanging" PageSize="20"
TabIndex="15" Width="866px" BackColor="White" BorderColor="#CCCCCC"
BorderWidth="1px">
<FooterStyle BackColor="White" ForeColor="#336699" />
<HeaderStyle BackColor="#336699" Font-Bold="True" ForeColor="White" />
<PagerSettings FirstPageText="First" LastPageText="Last" />
<PagerStyle BackColor="White" ForeColor="#336699" HorizontalAlign="Left" />
<RowStyle ForeColor="#336699" Font-Size="Small" />
<SelectedRowStyle BackColor="#669999" Font-Bold="True" ForeColor="White" />
<SortedAscendingCellStyle BackColor="#F1F1F1" />
<SortedAscendingHeaderStyle BackColor="#007DBB" />
<SortedDescendingCellStyle BackColor="#CAC9C9" />
<SortedDescendingHeaderStyle BackColor="#00547E" />
<Columns>
<asp:TemplateField HeaderText="Delete" ItemStyle-HorizontalAlign="Center" >
<ItemTemplate>
<asp:CheckBox ID="CheckBox1" runat="server" />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Update Quantity" ItemStyle-HorizontalAlign="Center" ItemStyle-Width="80">
<ItemTemplate>
<asp:TextBox ID="TextBox" runat="server" Width="90" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
br />
<br />
<asp:Label ID="lblsum" runat="server" CssClass="style19" Text="Sum Total"></asp:Label>
<br />
<asp:Label ID="sum" runat="server" CssClass="style19"></asp:Label>
<br />
</div>
<strong><asp:ImageButton ID="btnDelete" runat="server" Height="28px"
ImageUrl="/images/bt_Delete.jpg" onclick="btnDelete_Click"
OnClientClick="return DeleteConfirmation();" TabIndex="13" Width="106px" />
</strong> <asp:ImageButton ID="btnUpdate"
runat="server" Height="28px" ImageUrl="/images/btUpdate.jpg" Width="106px"
OnClientClick="return UpdateConfirmation();"
onclick="btnUpdate_Click" />
<asp:TextBox ID="username" runat="server" Height="16px" Visible="False"
Width="128px"></asp:TextBox>
<br />
<asp:Label ID="Label16" runat="server" Text="Notes:" ForeColor="#336699"></asp:Label>
<br />
<asp:TextBox ID="TextBox5" runat="server" Height="101px" TabIndex="10"
TextMode="MultiLine" Width="860px"></asp:TextBox>
<br />
<asp:ImageButton
ID="btnSend" runat="server" ImageUrl="/images/mail2.jpg"
onclick="Button1_Click" AlternateText="Send your Order"
TabIndex="11" Height="75px" Width="90px"/><strong><asp:ImageButton
ID="ImageButton1" runat="server" Height="66px"
ImageUrl="/images/logout.png" Width="56px"
onclick="ImageButton1_Click" />
</strong>
<br />
<strong>
<asp:Label ID="Label18" runat="server" style="color: #336699"
Text="*Delete Product from List: Check the products which you want to remove from your list and press the delete button."></asp:Label>
</strong>
</ContentTemplate>
<Triggers>
<asp:PostBackTrigger ControlID="btnExcel0" />
<asp:AsyncPostBackTrigger ControlID="ImageButton1" />
<asp:AsyncPostBackTrigger ControlID="code" EventName="SelectedIndexChanged" />
<asp:AsyncPostBackTrigger ControlID="type" EventName="SelectedIndexChanged" />
<asp:AsyncPostBackTrigger ControlID="p" EventName="SelectedIndexChanged" />
<asp:AsyncPostBackTrigger ControlID="dem" EventName="SelectedIndexChanged" />
<asp:AsyncPostBackTrigger ControlID="quant" EventName="TextChanged" />
<asp:AsyncPostBackTrigger ControlID="btnAdd" />
<asp:AsyncPostBackTrigger ControlID="btnDelete" />
<asp:AsyncPostBackTrigger ControlID="btnUpdate" />
<asp:AsyncPostBackTrigger ControlID="btnSend" />
</Triggers>
</asp:UpdatePanel>`