display data in textboxt

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Hi All,

How to display data in textboxt when you click dropdownlist.
This code only in designer, when i click dropdownlist,i will appear data and you may also can edit and update it data.

XML

<table style="width: 100%">
        <tr>
            <td align = "right" style="height: 67px">
                <asp:Label ID="LabelResp" runat="server" Text="Response Status: "
                 ></asp:Label>
            </td>
            <td style="height: 67px">
                <asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True">
                </asp:DropDownList>
            </td>
        </tr>
        <tr>
            <td colspan="2" >
                <asp:TextBox ID="TextBox1" runat="server" Height="300px" Width="500px" ></asp:TextBox>
                <asp:HtmlEditorExtender ID="TextBox1_HtmlEditorExtender" runat="server"  DisplaySourceTab ="false" EnableSanitization ="false"
                    Enabled="True" TargetControlID="TextBox1">
                </asp:HtmlEditorExtender>
            </td>
        </tr>
        <tr>
            <td colspan="2" align="center">
                <br />
                <asp:Button ID="Button1" runat="server" Text="Save" />
                <asp:Label ID="lblMessage" runat="server" ForeColor="#009933"></asp:Label>
            </td>
        </tr>
    </table>

Thanks in advance.

Posted 25-Jul-13 16:23pm

JennyChua

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Chui PuiKwan · Answer 1 · 2013-07-25T16:47:00

1.set DropDownList's attribute : AutoPostBack=true

2.add onchange event

C#

<asp:dropdownlist id="DropDownList1" onchange="change()" runat="server" autopostback="True" >

3.

C#

function change(){
document.getElementById("TextBox1").innerText="1234";
}

the previous code is client scrpit.

Server code :add SelectedIndexChanged event

C#

<asp:dropdownlist id="DropDownList1" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged" runat="server" autopostback="True" >

C#

protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
TextBox1.Text="1234";
}

http://msdn.microsoft.com/zh-tw/library/system.web.ui.webcontrols.listcontrol.selectedindexchanged.aspx[^]