Web Forms :: OnServerClick For ASP Controls (HTML Buttons)
May 29, 2010
I have several html buttons on my form which I have calling the same routine in my code behind.
For example:
<input id="cmdSaveChangesOnEdit" type="submit" value="Save Changes" name="cmdSaveChangesOnEdit" runat="server"
OnServerClick="cmdSaveMainPricingChanges" />
<input id="cmdSaveChangesOnEdit_NEW" type="submit" value="Save Changes" name="cmdSaveChangesOnEdit" runat="server"
OnServerClick="cmdSaveMainPricingChanges" />
I would like to replicate this functionality with the asp:DropDownList control i.e. I have several dropdowns which I would like to call the same code behind routine. However it seems that asp controls do not support the OnServerClick option. Is there a way to explicitly define which code behind routine to call on an asp control?
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Similar Messages:
Jan 28, 2011
I've created some dynamic buttons on page load but the buttons need to have an onserverclick event and pass a value. I used buttons because they can pass a value. My code below so far, just outputs onserverlick to the html page, which is obviously not what I want. Would it be possible to use some other method, I originally used hyperlinks until I needed to pass a value (I didn't want to use querystrings).
[Code]....
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Aug 20, 2010
I'm new with ASP.NET, and this is my first project that make myself cruel. I'm trying to create a link on every row that created dynamically.(I'm using GridView). The Problem is, the onserverclick eventhandler show nothing.? Heres the code:
public void GridV_RowDataBound(object sender, GridViewRowEventArgs e) {
if (e.Row.RowType == DataControlRowType.DataRow) {
e.Row.Cells[0].Text += "<font id='12345' runat='server' color='blue'
BACKGROUND-COLOR='#9471DE' style='cursor: pointer' Title='Click this:
to view to the Root menu of the thread'><U> <a onserverclick='Submit_Click'>This is description</a></u></font>";
e.Row.Cells[0].Text += "<br/>";
e.Row.Cells[0].Text += "<div id='DataDiv' style='overflow: auto; border: 1px solid olive;
width: 888px;'>"; //height: 300ox; onscroll='Onscrollfnction();'>";
FindHttpVideo1(dDataset.Tables[0].Rows[e.Row.RowIndex].ItemArray[0].ToString(), e, 0);
e.Row.Cells[0].Text += "</div>"; } }
Here the click EventHandler on also on code behind :
protected void Submit_Click(object sender, EventArgs e) {
Label1.Text = "Hello --->"; }
I don't want use Java script to for onclick() handler, I want to do it on code behind.
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Feb 2, 2010
I have been experiencing some very strange behavior using html buttons with the onserverclick attribute. What I am trying to do is use jQuery to designate the default button on the page. By default button I mean the button that is "clicked" when a user hits enter. In testing, I would hit enter while in an input field and sometimes the intended "default" button was clicked and the server side method defined in the corresponding onserverclick attribute was hit. Other times a post back was made without hitting the server method. In order to isolate the issue I created a minimal test case and found some very interesting results.
Client side:
[Code] ....
Server side:
public partial class admin_spikes_ButtonSubmitTest : System.Web.UI.Page {
protected void Page_Load(object sender, EventArgs e) {
} protected void ServerMethod1(object sender, EventArgs e) {
_response.Text = "server method1 was hit";
} protected void ServerMethod2(object sender, EventArgs e) {
_response.Text = "server method2 was hit"; } }
What I found was that everything worked as expected with this code except when I removed one of the input elements. In Firefox 3.6 and IE 8 when only one input exists on the page, hitting enter does not trigger the onserverclick, it makes a post back without even being jQuery "clicked" or actually "clicked". You can test this by starting with two inputs and clicking "test2". This will output "server method2 was hit". Then just hit enter and the output will be "server method1 was hit. Now take away an input and run the same test. Click "test2" see the results, then hit enter and you will see that nothing will change because the "test1" method was never hit. Chrome worked as expected
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Jan 12, 2011
I have the following client side code in .aspx page within a datalist itemtemplate that takes questions from the database like this:
[Code]....
The output is like:
1) What is your age group?
- Option 1
- Option 2
- Option 3
- Option 4
The ID's of the radio buttons are dynamic ("Q" & QuestionID). If there is no answer to a question then the GetVisible function returns false and the containing panel is hidden.
I have been trying to get rid of the html and replace these with asp:radiobuttons but it is not possible to set id's from databinding.. only simply. I was trying something like:
<asp:RadioButton ID="Q<%#Eval("ID")%>" runat="server" Visible='<%#GetVisible(Eval("OptionA").Tostring())%>'
Text='<%#Server.HtmlEncode(Eval("OptionA").ToString())%>' />
Here is the function that provides data:
[Code]....
but I'm finding it impossible to work with the html controls, i.e get their .text value from codebehind, or adding events!
better way to replace the html with suitable asp.net web controls or from the codebehind and output it. Or point me in the right direction?
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Feb 10, 2011
I would like to do the validation work using javascript or jquery in onclientclick and then show blockUI, next page using server click. But, I have a captcha validation in server click and I don't know how to validate the captcha in jquery or javascript.
protected void btnRegister_Click(object sender, EventArgs e) {
lblMessage.Text = ""; if (Page.IsValid) { if (txtUserName.Text == "") {
lblMessage.Text = "نام کاربری را وارد نمائید";
txtUserName.Focus(); return;
} if (!BLL.IsStrictPassword(txtPassword.Text)) {
lblMessage.Text = "طول کلمه عبور حداقل باید 5 کاراکتر باشد";
txtPassword.Focus(); return; } if (ddlYear.Text == "<سال>"
|| ddlMonth.Text == "<ماه>" || ddlDay.Text == "<روز>") {
lblMessage.Text = "لطفا تاریخ تولدتان را وارد نمائید";
return; } if (!chk_Low.Checked) {
lblMessage.Text = "برای عضویت می بایست قوانین سایت را بپذیرید"; return; } if (txtSecurityCode.Text == String.Empty) {
.Text = "کد امنیتی را وارد نکرده اید";
txtSecurityCode.Focus(); return; } secCode.ValidateCaptcha(txtSecurityCode.Text);
if (!secCode.UserValidated) {
lblMessage.Text = "کد امنیتی نادرست وارد شده است";
return; } try { //some code } }
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May 7, 2010
I am using ASP.NET. I have an html table. One of the table cells (td) has two buttons. Just recently, when it is being rendered it is wrapping the buttons. Can anyone tell me why this is happening?
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Jan 19, 2010
how to apply group name to html (input) radio button controls so that i can select any one of the available radio buttons?
I have input radios in a table. Each row contains two radios as follows. I want to select one from each row. But i am able to select only one radio button amongst all radio buttons present on all rows.
<input name="radiobutton" type="radio" value="radiobutton" />Option1
<input name="radiobutton" type="radio" value="radiobutton" />Option2
What change i have to make to select one radio button on each row?
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Feb 24, 2010
I have a list of input type radio buttons in formview (edit mode) and i want to bind data from datasource that is assigned to formview. Can i bind html radio buttons using sql datasource?
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Jul 23, 2010
I have some experience of using paypal with an asp.net website, however this issue has me really stumped.
Root of the problem: You cant embed the html form for the paypal button inside your page form.
Original solution: Originally my website was using multiple aspx pages so I could simply arrange my form tags so that they weren't embedded inside one another.
My website now uses a master aspx page which draws in different ascx controls. This means that I do not have the option of arranging the form tags around the page so need a work around.
NB. I have looked all over the place for simple solutions but it is a jungle out there, paypal is a nightmare. I did find something on ghost form which is all in c#.
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Nov 6, 2010
ASP.NET MVC - Multiple Buttons on a Form this is what I am trying to do too, except the first answer doesn't satisfy my requirements and the second one uses formcollection. I am not passing formcollection. I am passing values to the ActionResult method, because in my scenario, it doesn't make much sense to use formcollection, because user is hardly filling out any data. I really prefer using SubmitImage at the moment, so I would prefer if your solution doesn't involve me switching to css or input type etc. EDIT: I'm using Ajax.BeginForm and that seems to be the problem rather than Html.SubmitImage
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Feb 1, 2010
Here's what is in my .aspx:
<div> <input id="testButton" type="image" src="<%=TestImageUrl %>" onserverclick="RedirectTest" /> </div>
And in my code-behind this:
protected void RedirectTest(object sender, EventArgs e) {
// Logic is here}
It's not hitting my method at all when I click the image. And please note, I do not want to use an ImageButton. I want to figure out how to get this working with a plain old input tag.
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Jan 5, 2011
The event is simply not firing, what am I missing?
Code for the button:
<input type="button" class="button hide" id="savetext" style="float:right;" value="Hello" runat="server" OnServerClick="savetext_Click"/>
And the code that is generated (i.e. when opened in a browser and the source is viewed) is this:
<input onclick="__doPostBack('ctl00$Main$savetext','')" name="ctl00$Main$savetext" type="button" id="savetext" style="float:right;" class="button hide" value="Save to text" />
I've got <pages clientIDMode="Static" /> in web.config but the name and generated onclick event are prefixed despite that. Server side code:
Protected Sub savetext_Click(ByVal sender As Object, ByVal e As System.EventArgs)
End Sub
To be clear, my goal is to register a click on a button server-side, not just client-side.
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Jan 28, 2011
protected void btnNext_Click(object sender, EventArgs e) { btnNext.InnerHtml = "CLICK";
} <button type="submit" runat="server" onserverclick="btnNext_Click" id="btnNext">Next > </button>
This works fine, but when I add an onclick event:
<button type="submit" runat="server" onserverclick="btnNext_Click" onclick="return checkForm();" id="btnNext">Next > </button>
And in the head:
<script type="text/javascript"> function checkForm() {
if (document.getElementById("<%=lstChooseSpec.ClientID %>").value) {
return true; } else {
$.jGrowl("<strong>Warning!</strong><br />Please select an item", { sticky: true });
return false; } } </script>
It submits the form, but doesn't change the buttons text to 'CLICK'. The text only changes to 'CLICK' when the onclick() isn't defined, although the form is still submitting!
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Nov 22, 2010
I have a form with my own JQuery validation. When a JQuery <button id=btnRegister type=submit> is clicked, my validation code is invoked and if invalid, form does not submit. All works great. I have another <button id=btnSave> on this form. I would like btnSave to fire asp.net server side event (onserverclick) only if form data is valid. I have tried following -
<button type=submit onclick='if($(this).closest('form').submit()==false) return;' onserverclick='btnSave_click' runat =server>Save</button>
When I click on the btnSave, it does invoke my form's submit event handler, which correctly returns false, if invalid. So far so good. After this point, I would like the onserverclick event not trigger. However, the onserverclick does trigger and the page posts back, even when the form is invalid. As I see it, cannot have onclick and onserverclick at the same time. What should I do to make them co-exist harmoniously? If I change <button> to <input type=submit> it all works out. But I like <button>'s look and feel more.
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Jan 14, 2010
When I write the code for Each HtmlAnchor a in Me.Master.FindControls("link" + i)
AddHandler e.OnServerClick, AddressOf OnClick
end for
I get an error that OnServerClick event is protected and I cannot access it. The question is how do I dynamically add event handlers to HtmlAnchor controls?
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Mar 4, 2010
In my form i have three radio buttons and nine image buttons, three image buttons per radio buttons
If the user check one radio button, the respective three image buttons only has to be displayed.
In a single time one radio button only can be checked the rest two would be unchecked
Here i have pasted the aspx file design source
[Code]....
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Feb 13, 2011
I have created a load of dynamic buttons in an update panel. I do this so that there is one button for each client name in my DB. I want to then go through a list of these buttons and change the colour of them depending on another value retrieved from my database. How can I get a list of the buttons that have been created on my update panel. What would be the best method to update the colour as soon as they have been created? Would I use the preRender to create the button objects and then use the form load to update their colour or is there a better way of doing this?
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Feb 20, 2010
The following seems reasonable, but it returns an error:
<asp:Repeater ID="RepeaterF" runat="server" DataSourceID="DSF" >
<ItemTemplate>
<%
If Eval("Item_Batch") = 0 Then
%><tr><td></td><td colspan="2"></td><td></td></tr><%
Else %>........
Error: "Databinding methods such as Eval(), XPath(), and Bind() can only be used in the context of a databound control."
I am finding it difficult to accept that the whole Repeater approach has any benefits over just creating a loop in code, iterating through a recordset, and building a html table into a variable, then dumping it to the page. This repeater is spawning pages of code and objects, and surely this is all using up server resources.
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Aug 2, 2010
I have a gridview which on the left hand column it will be the Select button, but I think when we did this in Gridview, it will select mulitple button (it's like a checklist). I have made some changes, but I still cannot get the button to select only 1 row instead of multiple.
[Code]....
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Jan 22, 2011
I have a datagrid where i use template columns. In the EditItemtemplate of a column i display a Link button.Now I have one more button which is a EDIT button in the normal EditcommandcolumnI am trying to use Itemcommand to handle the buttonclick in the EditItemTemplate and the normal ONEDIT for the Edit button.Now the problem is, since Itemcommand event considers the post back of even this Editbutton it get fired before the datagrid goes to editmode.So can some one help me with the eventhandling code that will recognize which Buttonclick firest the Itemcommand even of a datagridTo make it very simple, Short and sweet. HOW DO I HANDLE TWO DIFFERENT BUTTON CLICK IN A ITEMCOMMAND EVENT OF A DATAGRID?
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Oct 27, 2010
i want to disable some buttons in my emptydata template. i tried using this code but it cant find the control. thus returning an error Specified argument was out of the range of valid values.
Button btnsaveini = (Button)grdNonSerialized.Controls[0].Controls[0].FindControl("btnSave1");
btnsaveini.Enabled = false;
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Jun 17, 2010
disable an Add button in a gridview when the Edit or Delete button is clicked.?
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Dec 12, 2010
I have seven buttons in a 3-column radiobuttonlist. The order is
1 1 3
2 2 Infinitive
3
I want it to look like:
1 1
2 2
3 3 Infinitive
Changing TextAligh does nothing.
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Dec 27, 2010
We have a page the we have to write where users are shown 'pages' of data from our database they then select the row they want and we take them into another part of the application where they can work with the data.
When we use the built in paging (in the gridview) it is just too slow, as there is too much data.
We have written paging into our stored procedure that gets the data to work around this. The stored procedure works just fine and it is quite fast.
How can I get 'paging' buttons into my gridview when I am not using the built in gridview paging?I can keep it simple if I have to (next and previous only) but it would be better to have a 'first', 'previous', 'next', 'last' type buttons.
I cannot seem to figure out how to get these buttons into the gridview however.
some sample code (preferably vb) that would show this? (or something similar)
Built in paging is not an option.
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