asp.net ajax笔记3

 一个dropdownlist给人选择部门，下面用一个DETAILVIEW来显示该部门下的员工信息，注意将detailview 放在
updatepannel中，其triggers属性设定为部门下拉框的selectedIndexchanged事件引发的ASYNCPOSTBACKTRIGGERS触发器
 前端：
 <asp:ScriptManager ID="ScriptManager1" runat="server">
            </asp:ScriptManager>
            <br />
            <table>
                <tr>
                    <td style="width: 443px">
                        请选择一个部门：<asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True" DataSourceID="DepartmentList"
                            DataTextField="部门" DataValueField="部门" Width="216px" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged">
                        </asp:DropDownList><asp:SqlDataSource ID="DepartmentList" runat="server" ConnectionString="<%$ ConnectionStrings:chtNorthwind %>"
                            DataSourceMode="DataReader" SelectCommand="SELECT DISTINCT [部门] FROM [章立民工作室]"></asp:SqlDataSource>
                    </td>
                </tr>
                <tr>
                    <td style="width: 443px">
                        <asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
                            <ContentTemplate>
                                <asp:DetailsView ID="DetailsView1" runat="server" AllowPaging="True" AutoGenerateRows="False"
                                    CellPadding="4" DataKeyNames="员工号码" DataSourceID="LimingStudio" ForeColor="#333333"
                                    GridLines="None" Height="50px" Width="488px" OnItemDeleted="DetailsView1_ItemDeleted"
                                    OnItemInserted="DetailsView1_ItemInserted" OnItemUpdated="DetailsView1_ItemUpdated"
                                    OnPageIndexChanging="DetailsView1_PageIndexChanging">
                                    <FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
                                    <CommandRowStyle Font-Bold="True" BackColor="#D1DDF1" />
                                    <EditRowStyle BackColor="#2461BF" />
                                    <RowStyle BackColor="#EFF3FB" />
                                    <PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />
                                    <Fields>
                                        <asp:BoundField DataField="员工号码" HeaderText="员工号码：" InsertVisible="False" ReadOnly="True"
                                            SortExpression="员工号码">
                                            <HeaderStyle HorizontalAlign="Right" Width="130px" />
                                        </asp:BoundField>
                                        <asp:BoundField DataField="身份证号码" HeaderText="身份证号码：" SortExpression="身份证号码">
                                            <HeaderStyle HorizontalAlign="Right" Width="130px" />
                                        </asp:BoundField>
                                        <asp:BoundField DataField="姓名" HeaderText="姓名：" SortExpression="姓名">
                                            <HeaderStyle HorizontalAlign="Right" Width="130px" />
                                        </asp:BoundField>
                                        <asp:TemplateField HeaderText="性别：" SortExpression="性别">
                                            <EditItemTemplate>
                                                <asp:DropDownList ID="DropDownList2" runat="server" SelectedValue='<%# Bind("性别") %>'>
                                                    <asp:ListItem>男</asp:ListItem>
                                                    <asp:ListItem>女</asp:ListItem>
                                                </asp:DropDownList>
                                            </EditItemTemplate>
                                            <InsertItemTemplate>
                                                <asp:DropDownList ID="DropDownList3" runat="server" SelectedValue='<%# Bind("性别") %>'>
                                                    <asp:ListItem>男</asp:ListItem>
                                                    <asp:ListItem>女</asp:ListItem>
                                                </asp:DropDownList>
                                            </InsertItemTemplate>
                                            <HeaderStyle HorizontalAlign="Right" Width="130px" />
                                            <ItemTemplate>
                                                <asp:Label ID="Label2" runat="server" Text='<%# Bind("性别") %>'></asp:Label>
                                            </ItemTemplate>
                                        </asp:TemplateField>
                                        <asp:TemplateField HeaderText="地址：" SortExpression="地址">
                                            <EditItemTemplate>
                                                <asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("地址") %>' Width="312px"></asp:TextBox>
                                            </EditItemTemplate>
                                            <InsertItemTemplate>
                                                <asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("地址") %>' Width="312px"></asp:TextBox>
                                            </InsertItemTemplate>
                                            <HeaderStyle HorizontalAlign="Right" Width="130px" />
                                            <ItemTemplate>
                                                <asp:Label ID="Label1" runat="server" Text='<%# Bind("地址") %>'></asp:Label>
                                            </ItemTemplate>
                                        </asp:TemplateField>
                                        <asp:BoundField DataField="邮政编码" HeaderText="邮政编码：" SortExpression="邮政编码">
                                            <HeaderStyle HorizontalAlign="Right" Width="130px" />
                                        </asp:BoundField>
                                        <asp:BoundField ApplyFormatInEditMode="True" DataField="出生日期" DataFormatString="{0:d}"
                                            HeaderText="出生日期：" HtmlEncode="False" SortExpression="出生日期">
                                            <HeaderStyle HorizontalAlign="Right" Width="130px" />
                                        </asp:BoundField>
                                        <asp:TemplateField HeaderText="婚姻状况：" SortExpression="婚姻状况">
                                            <EditItemTemplate>
                                                &nbsp;<asp:DropDownList ID="DropDownList4" runat="server" SelectedValue='<%# Bind("婚姻状况") %>'>
                                                    <asp:ListItem>已婚</asp:ListItem>
                                                    <asp:ListItem>未婚</asp:ListItem>
                                                </asp:DropDownList>
                                            </EditItemTemplate>
                                            <InsertItemTemplate>
                                                <asp:DropDownList ID="DropDownList5" runat="server" SelectedValue='<%# Bind("婚姻状况") %>'>
                                                    <asp:ListItem>已婚</asp:ListItem>
                                                    <asp:ListItem>未婚</asp:ListItem>
                                                </asp:DropDownList>
                                            </InsertItemTemplate>
                                            <HeaderStyle HorizontalAlign="Right" Width="130px" />
                                            <ItemTemplate>
                                                <asp:Label ID="Label3" runat="server" Text='<%# Bind("婚姻状况") %>'></asp:Label>
                                            </ItemTemplate>
                                        </asp:TemplateField>
                                        <asp:BoundField ApplyFormatInEditMode="True" DataField="到职日期" DataFormatString="{0:d}"
                                            HeaderText="到职日期：" HtmlEncode="False" SortExpression="到职日期">
                                            <HeaderStyle HorizontalAlign="Right" Width="130px" />
                                        </asp:BoundField>
                                        <asp:BoundField DataField="起薪" HeaderText="起薪：" SortExpression="起薪">
                                            <HeaderStyle HorizontalAlign="Right" Width="130px" />
                                        </asp:BoundField>
                                        <asp:BoundField DataField="目前薪资" HeaderText="目前薪资：" SortExpression="目前薪资">
                                            <HeaderStyle HorizontalAlign="Right" Width="130px" />
                                        </asp:BoundField>
                                        <asp:BoundField ApplyFormatInEditMode="True" DataField="加薪日期" DataFormatString="{0:d}"
                                            HeaderText="加薪日期：" HtmlEncode="False" SortExpression="加薪日期">
                                            <HeaderStyle HorizontalAlign="Right" Width="130px" />
                                        </asp:BoundField>
                                        <asp:TemplateField HeaderText="部门：" SortExpression="部门">
                                            <EditItemTemplate>
                                                <asp:DropDownList ID="DropDownList6" runat="server" DataSourceID="DepartmentList"
                                                    DataTextField="部门" DataValueField="部门" SelectedValue='<%# Bind("部门") %>'>
                                                </asp:DropDownList>
                                            </EditItemTemplate>
                                            <InsertItemTemplate>
                                                <asp:DropDownList ID="DropDownList7" runat="server" DataSourceID="DepartmentList"
                                                    DataTextField="部门" DataValueField="部门" SelectedValue='<%# Bind("部门") %>'>
                                                </asp:DropDownList>
                                            </InsertItemTemplate>
                                            <HeaderStyle HorizontalAlign="Right" Width="130px" />
                                            <ItemTemplate>
                                                <asp:Label ID="Label4" runat="server" Text='<%# Bind("部门") %>'></asp:Label>
                                            </ItemTemplate>
                                        </asp:TemplateField>
                                        <asp:TemplateField ShowHeader="False">
                                            <EditItemTemplate>
                                                <asp:LinkButton ID="LinkButton1" runat="server" CausesValidation="True" CommandName="Update"
                                                    Text="更新" BackColor="White"></asp:LinkButton>
                                                <asp:LinkButton ID="LinkButton2" runat="server" CausesValidation="False" CommandName="Cancel"
                                                    Text="取消" BackColor="White"></asp:LinkButton>
                                            </EditItemTemplate>
                                            <InsertItemTemplate>
                                                <asp:LinkButton ID="LinkButton1" runat="server" CausesValidation="True" CommandName="Insert"
                                                    Text="插入" BackColor="White"></asp:LinkButton>
                                                <asp:LinkButton ID="LinkButton2" runat="server" CausesValidation="False" CommandName="Cancel"
                                                    Text="取消" BackColor="White"></asp:LinkButton>
                                            </InsertItemTemplate>
                                            <ControlStyle ForeColor="#C00000" />
                                            <ItemTemplate>
                                                <asp:LinkButton ID="LinkButton1" runat="server" CausesValidation="False" CommandName="Edit"
                                                    Text="编辑"></asp:LinkButton>
                                                <asp:LinkButton ID="LinkButton2" runat="server" CausesValidation="False" CommandName="New"
                                                    Text="添加"></asp:LinkButton>
                                                <asp:LinkButton ID="LinkButton3" runat="server" CausesValidation="False" CommandName="Delete"
                                                    OnClientClick="return confirm('您确定要删除此笔数据纪录吗?');" Text="删除"></asp:LinkButton>
                                            </ItemTemplate>
                                        </asp:TemplateField>
                                    </Fields>
                                    <FieldHeaderStyle BackColor="#DEE8F5" Font-Bold="True" />
                                    <HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" VerticalAlign="Top" />
                                    <AlternatingRowStyle BackColor="White" />
                                    <PagerSettings FirstPageImageUrl="~/Images/First.gif" LastPageImageUrl="~/Images/Last.gif"
                                        Mode="NextPreviousFirstLast" NextPageImageUrl="~/Images/Next.gif" PreviousPageImageUrl="~/Images/Previous.gif" />
                                </asp:DetailsView>
                                <asp:SqlDataSource ID="LimingStudio" runat="server" ConnectionString="<%$ ConnectionStrings:chtNorthwind %>"
                                    DeleteCommand="DELETE FROM [章立民工作室] WHERE [员工号码] = @员工号码" InsertCommand="INSERT INTO [章立民工作室] ([身份证号码], [姓名], [性别], [地址], [邮政编码], [出生日期], [婚姻状况], [到职日期], [起薪], [目前薪资], [加薪日期], [部门]) VALUES (@身份证号码, @姓名, @性别, @地址, @邮政编码, @出生日期, @婚姻状况, @到职日期, @起薪, @目前薪资, @加薪日期, @部门)"
                                    SelectCommand="SELECT * FROM [章立民工作室] WHERE ([部门] = @部门)" UpdateCommand="UPDATE [章立民工作室] SET [身份证号码] = @身份证号码, [姓名] = @姓名, [性别] = @性别, [地址] = @地址, [邮政编码] = @邮政编码, [出生日期] = @出生日期, [婚姻状况] = @婚姻状况, [到职日期] = @到职日期, [起薪] = @起薪, [目前薪资] = @目前薪资, [加薪日期] = @加薪日期, [部门] = @部门 WHERE [员工号码] = @员工号码">
                                    <DeleteParameters>
                                        <asp:Parameter Name="员工号码" Type="Int32" />
                                    </DeleteParameters>
                                    <UpdateParameters>
                                        <asp:Parameter Name="身份证号码" Type="String" />
                                        <asp:Parameter Name="姓名" Type="String" />
                                        <asp:Parameter Name="性别" Type="String" />
                                        <asp:Parameter Name="地址" Type="String" />
                                        <asp:Parameter Name="邮政编码" Type="String" />
                                        <asp:Parameter Name="出生日期" Type="DateTime" />
                                        <asp:Parameter Name="婚姻状况" Type="String" />
                                        <asp:Parameter Name="到职日期" Type="DateTime" />
                                        <asp:Parameter Name="起薪" Type="Decimal" />
                                        <asp:Parameter Name="目前薪资" Type="Decimal" />
                                        <asp:Parameter Name="加薪日期" Type="DateTime" />
                                        <asp:Parameter Name="部门" Type="String" />
                                        <asp:Parameter Name="员工号码" Type="Int32" />
                                    </UpdateParameters>
                                    <SelectParameters>
                                        <asp:ControlParameter ControlID="DropDownList1" Name="部门" PropertyName="SelectedValue"
                                            Type="String" />
                                    </SelectParameters>
                                    <InsertParameters>
                                        <asp:Parameter Name="身份证号码" Type="String" />
                                        <asp:Parameter Name="姓名" Type="String" />
                                        <asp:Parameter Name="性别" Type="String" />
                                        <asp:Parameter Name="地址" Type="String" />
                                        <asp:Parameter Name="邮政编码" Type="String" />
                                        <asp:Parameter Name="出生日期" Type="DateTime" />
                                        <asp:Parameter Name="婚姻状况" Type="String" />
                                        <asp:Parameter Name="到职日期" Type="DateTime" />
                                        <asp:Parameter Name="起薪" Type="Decimal" />
                                        <asp:Parameter Name="目前薪资" Type="Decimal" />
                                        <asp:Parameter Name="加薪日期" Type="DateTime" />
                                        <asp:Parameter Name="部门" Type="String" />
                                    </InsertParameters>
                                </asp:SqlDataSource>
                                <asp:Label ID="ErrorMessageLabel" runat="server" ForeColor="Red" Width="480px"></asp:Label>
                            </ContentTemplate>
                            <Triggers>
                                <asp:AsyncPostBackTrigger ControlID="DropDownList1" EventName="SelectedIndexChanged" />
                            </Triggers>
                        </asp:UpdatePanel>
                    </td>
                </tr>
            </table>
        </div>
    </form>

后台（注意detailview中的增，删，改触发的事件里，要判断其异常）

 protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
    {
        // 在选取了不同的部门之后，就将 DetailsView 控件切换至只读模式，也就是一般的显示模式。
        DetailsView1.ChangeMode(DetailsViewMode.ReadOnly);
    }

    protected void DetailsView1_PageIndexChanging(object sender, DetailsViewPageEventArgs e)
    {
        // 在 DetailsView 控件中切换至其它页面后，
        // 就将 DetailsView 控件切换至只读模式，也就是一般的显示模式。
        DetailsView1.ChangeMode(DetailsViewMode.ReadOnly);
    }

    protected void DetailsView1_ItemUpdated(object sender, DetailsViewUpdatedEventArgs e)
    {
        if (e.Exception != null || e.AffectedRows <= 0)
        {
            ErrorMessageLabel.Text = "在编辑数据时发生错误，请确认所输入之数据的格式是否正确。";
            e.ExceptionHandled = true;
        }
        else
        {
            ErrorMessageLabel.Text = "已经成功编辑数据...";
        }
    }

    protected void DetailsView1_ItemDeleted(object sender, DetailsViewDeletedEventArgs e)
    {
        if (e.Exception != null || e.AffectedRows <= 0)
        {
            ErrorMessageLabel.Text = "因为数据表上拥有外部索引键条件约束，因此无法删除。您只能删除没有关联数据记录的数据记录。";
            e.ExceptionHandled = true;
        }
        else
        {
            ErrorMessageLabel.Text = "已经成功删除资料...";
        }
    }

    protected void DetailsView1_ItemInserted(object sender, DetailsViewInsertedEventArgs e)
    {
        if (e.Exception != null || e.AffectedRows <= 0)
        {
            ErrorMessageLabel.Text = "在添加数据时发生错误，请确认所输入之数据的格式是否正确。";
            e.ExceptionHandled = true;
        }
        else
        {
            ErrorMessageLabel.Text = "已经成功添加资料...";
        }
    }