I am needing to call a javascript function when my asp:ListBox has a selection change rather then running some server side code. What I have at the moment is.
<asp:ListBox ID="lbCustomerFolders" runat="server" Width="100%" Height="98%" AutoPostBack="true" OnSelectedIndexChanged="lbCustromerFolders_SelectedIndexChanged"/>
Where the OnSelectedIndexChanged I require that function or something similar to call a javascript function.
Add on change event in your control lie I have added in following example. Notice that there are onchange as well as OnSelectedIndexChanged event there on the ListBox so on the selection change event both JavaScript and server side event is going to get called.
In your case change would be data which you are providing.
<asp:ListBox ID="lbCustomerFolders" runat="server" Width="9%" Height="98%" onchange="YourChangeEventJS(this)" AutoPostBack="true" OnSelectedIndexChanged="lbCustomerFolders_SelectedIndexChanged">
<asp:ListItem Text="Red" Value="#FF0000" Selected="True" />
<asp:ListItem Text="Blue" Value="#0000FF" />
<asp:ListItem Text="Green" Value="#008000" />
</asp:ListBox>
Following is script should be there on your page
<script type="text/javascript">
function YourChangeEventJS(ddl) {
alert(ddl.selectedIndex);
}
Related
I have some code inside of an asp:UpdatePanel that after clicking a button. it'll will hide a Label and replace that with an editable Textbox. This functionality all works fine within the UpdatePanel, however after clicking this button to make the call (which is also inside of the UpdatePanel), it causes asp:LinkButtons that appear after and outside of the UpdatePanel not to work anymore. These links work prior to interacting with controls inside of the UpdatePanel, but stop working after the fact. It's worth noting that these linkbuttons are dynamically created and appended to an existing div that follows and is not inside the UpdatePanel causing this issue. For good measure I tried calling the method that dynamically creates and appends these controls whenever the update panel made a callback to the server, but to no avail.
<div>
<asp:ScriptManager ID="ScriptManager1" runat="server" />
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<label class="reportModeLabel">Primary Mode: </label>
<div id="divShowMode" runat="server" class="inlineItem">
<asp:Label ID="lblPrimaryMode" runat="server"></asp:Label>
<asp:LinkButton ID="lnkPrimaryMode" runat="server" CssClass="clickOnce" OnClick="lnkPrimaryMode_Click">
<asp:Image ID="imgChangePrimaryMode" runat="server" CssClass="imgReportUpdateMenuItem" ImageUrl="~/Images/Edit.png" />
</asp:LinkButton>
</div>
<div id="divUpdateMode" runat="server" class="inlineItem" >
<asp:DropdownList ID="ddlModeOfTransmission" runat="server" Width="40%" CssClass="metaItemDropdown">
<asp:ListItem Text="Food" Value="1"></asp:ListItem>
<asp:ListItem Text="Water" Value="2"></asp:ListItem>
<asp:ListItem Text="Animal" Value="3"></asp:ListItem>
<asp:ListItem Text="Person to Person" Value="4"></asp:ListItem>
<asp:ListItem Text="Environmental" Value="5"></asp:ListItem>
<asp:ListItem Text="Other/Unknown" Value="6"></asp:ListItem>
</asp:DropdownList>
<asp:LinkButton ID="lnkPrimaryModeSave" runat="server" CssClass="clickOnce" OnClick="lnkPrimaryModeSave_Click">
<asp:Image ID="imgPrimaryModeSave" runat="server" ImageUrl="~/Images/Check-Selected.png" />
</asp:LinkButton>
</div>
</ContentTemplate>
</asp:UpdatePanel>
</div>
<div class="divWizardMenu">
//The link button controls that no longer work after using the
//UpdatePanel are dynamically created on server and added here
<ul id="ulMainMenu" runat="server"/>
</div>
//UpdatePanel ajax calls
protected void lnkPrimaryMode_Click(object sender, EventArgs e)
{
divShowMode.Visible = false;
divUpdateMode.Visible = true;
ddlModeOfTransmission.SelectedValue = Record.PrimaryModeOfTransmissionID.ToString();
}
protected void lnkPrimaryModeSave_Click(object sender, EventArgs e)
{
divUpdateMode.Visible = false;
divShowMode.Visible = true;
}
Are you assigning your dynamically created LinkButtons an ID when you create them?
I think they will need the ID to be set so that Events can be rewired up on Postback.
I know it has been asked several times and I found many solutions but no solution worked for me.
I am working on IE
<asp:RadioButtonList ID="rbtnView" runat="server" OnSelectedIndexChanged="rbtnView_SelectedIndexChanged"
AutoPostBack="True" TabIndex="7" RepeatDirection="Horizontal">
<asp:ListItem Selected="True" Value="0">Show Pending</asp:ListItem>
<asp:ListItem Value="1">Show Processed</asp:ListItem>
</asp:RadioButtonList>
here is the button code from where I am calling the function:
<asp:Button ID="btnPrint" runat="server" CssClass="myButton" OnClick="btnPrint_Click"
Text="Print" ValidationGroup="validationgroup2" TabIndex="9" OnClientClick="doPrint()" />
here is the javascrit function
function doPrint() {
debugger;
var rad = $('#<%=rbtnView.ClientID %> input[type=radio]:checked').val();
}
Any help would be appreciated.
var radioValue = $("input[name='YOURVALUEFORTHEGROUP']:checked").val();
replace YOURVALUEFORTHEGROUP
The javascript function works just fine. But you are doing a form post (PostBack) when pressing the btnPrint button.
You can use a regular button instead of an asp.net Control. Or if you need a PostBack to execute the btnPrint_Click method. But then you can get the value there. It all depends why you need the value client side.
<input type="button" value="Get value" onclick="doPrint()" />
Or add return false to the aspnet button.
OnClientClick="doPrint(); return false;"
I want to call javascript function on Dropdown menu selectedindexchanged. I tried this
<asp:DropDownList ID="selectVehicle" AutoPostBack="true" OnSelectedIndexChanged="GetRoute(this.options[this.selectedIndex].value);" runat="server" CssClass="inners">
<asp:listitem Selected>-- Select Vehicle --</asp:listitem>
<asp:listitem Value="16">Tata Ace</asp:listitem>
<asp:listitem Value="28">Tata 407</asp:listitem>
</asp:DropDownList>
Error
BC30456: 'GetRoute' is not a member of 'ASP.index3_aspx'.
Then I tried onChange instead of OnSelectedIndexChanged but it has no use for me since in my js function values inserted in textbox which is working but when page reloads textbox again gets blank & I can't turn off AutoPostBack since it is required to postback. Is is possible I can run javascript OnSelectedIndexChanged ?
You can use the standard javascript onchange:
<asp:DropDownList ID="selectVehicle" AutoPostBack="false" onchange="GetRoute(this.options[this.selectedIndex].value);" runat="server" CssClass="inners">
</asp:DropDownList>
Assuming GetRoute is a javascript function.
ASP.NET will ignore the onchange attribute and render it in the resulting select element.
Rahul Singh's comment to write the JS code into the server code, and only run the server code, no Javascript, makes sense.
In the event you have to have the JS for some reason, you can remove the autopostback = true, and manually call __doPostBack with parameters, the value your JS is producing for example.
JavaScript: Multiple parameters in __doPostBack
I have a radiobuttonlist on whose change event I want to change the watermark text in a textbox.
But I am not able to call Javascript function from RadioButtonList and also not able to retrieve the value of the selected field.
Below is the code for the same.
<asp:RadioButtonList ID="rdbSelectType" runat="server" CssClass="radioButtonList" RepeatDirection="Horizontal" AutoPostBack="true" OnSelectedIndexChanged="rdbSelectType_SelectedIndexChanged">
<asp:ListItem Selected="True" Value="0" Text="Auto Generate"></asp:ListItem>
<asp:ListItem Value="1" Text="Manually Generate"></asp:ListItem>
</asp:RadioButtonList>
Can anyone help me on this please?
I have a dropdown list whose value is changed based on other controls in the UI using javascript.
I used the following code to change the dropdown list,
document.getElementById("ddlchkStsID").options[2].selected = true;
document.getElementById("ddlchkStsID").value = "3";
But in the code-behind, the ddlchkStsID.SelectedValue is still coming as first option's value.
This the control in aspx page.
<asp:DropDownList ID="ddlchkStsID" runat="server" TabIndex="10" CssClass="meta">
<asp:ListItem Text="TBD" Value="1" />
<asp:ListItem Text="Yes" Value="2" />
<asp:ListItem Text="No" Value="3" />
</asp:DropDownList>
Could someone help me how to get the changed value in the code-behind.
thanks in advance :)
Since the control is running at the server, you should be referencing the control using the ClientID, like this:
document.getElementById("<%=ddlchkStsID.ClientID%>").options[2].selected = true;
Is your JavaScript code actually working?