通过选择带有回发的级联下拉列表，从数据库设置文本框值 [英] Set textbox value from database by selecting cascading dropdown with out postback

问题描述

是否有可能根据选择ajax级联下拉而不自动回发来设置数据库中的文本框值？如果可能的话怎么办？

Is there any possibility to set textbox value from database based on selecting ajax cascading drop down without auto postback?if possible how?

推荐答案

是的，使用



< asp：updatepanel id =UpdatePanel1runat =serverxmlns：asp =＃unknown>

< contenttemplate> ;

< asp：textbox id =txtIDrunat =server>



< triggers> < asp：asyncpostbacktrigger controlid =yourdropdownlistideventname =SelectedIndexChanged>







in代码背后



protected void yourdropdownlistid_SelectedIndexChanged（object sender，EventArgs e）

{

//获取数据来自数据库并将值分配给文本框

}

yes, use

<asp:updatepanel id="UpdatePanel1" runat="server" xmlns:asp="#unknown">
<contenttemplate>
<asp:textbox id="txtID" runat="server">

<triggers> <asp:asyncpostbacktrigger controlid="yourdropdownlistid" eventname="SelectedIndexChanged">



in code behind

protected void yourdropdownlistid_SelectedIndexChanged(object sender, EventArgs e)
{
//get Data from database and assign the value to textbox
}

<cc1:UpdatePanel ID="UpdatePanel1" runat="server">
                            <ContentTemplate>
                                <asp:TextBox ID="txtMaxDiscount" runat="server" CssClass="userentry"></asp:TextBox>
                            </ContentTemplate>
                            <Triggers>
                                <asp:AsyncPostBackTrigger ControlID="ddlMutationType" EventName="SelectedIndexChanged" />
                            </Triggers>
                        </cc1:UpdatePanel>

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