Web Forms :: Why Validation Controls Fire Twice
Mar 22, 2010
VWD 2008 Express. Visual Basic.
I noticed on a number of formviews that my validation controls seemed to be firing twice (which they were). I just found a case where a "Save" button had
onclick="UpdateButton_Click" in its defintion on the aspx page as well as the event routine having a "Handles UpdateButton.Click." This scenario made the UpdateButton_Click code run twice (and thus I expect that any validation controls would fire twice as well). When I removed the onclick="UpdateButton_Click"from the button defintion, the code only ran once, as desired. This double validation has gotten me especially with customvalidators.
Protected Sub UpdateButton_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles UpdateButton.Click
<my code>
End Sub
The question now is, why does having the onclick defined as well as the "Handles" on the event routine cause a double run of the event routine?I am going back into all my code to find where I have this "double" hit and remove the onclick in those instances.
View 7 Replies
Similar Messages:
Mar 25, 2011
i need required field validators for few of textboxes and if everything is filled then on clk of submit btn i want to display an alert msg with sme text.so i kept required field validatiors for all txtboxes and in for alert i wrote javascript function...so first the script gets triggered and then the validators?? wat is the soln:?
View 4 Replies
May 7, 2010
i have a page with 2 Textboxes. in that page i use userControl with 2 textbox and a Save button now case is when i click on Save Button...i want to validate my controls. Both of page and both of usercontrol. in usercontrol is done by customvalidator... because of some specific conditions. now same time ... the controls of page should be validated for requred fieldvalitors, the issue is.... same type of usercontrol i have and which are on page same time. so i am not able to fire validation controls for parent page.
View 5 Replies
Apr 7, 2010
I have a form with several text boxes on it. I only want to accept floats, but it is likely that users will enter a dollar sign. I'm using the following code to remove dollar signs and validate the content:
jQuery:
$("#<%= tb.ClientID %>").change(function() {
var ctrl = $("#<%= tb.ClientID %>");
ctrl.val(ctrl.val().replace('$',''))
});
asp.net validation:
<asp:CompareValidator ID="CompareValidator4" runat="server" Type="Double" ControlToValidate="tb" Operator="DataTypeCheck" ValidationGroup="vld_Page" ErrorMessage="Some error" />
My problem is that when someone enters a dollar sign in the TextBox "tb" and changes focus the validation happens first and THEN the jQuery removes the dollar sign. Is it possible to have the jQuery run first or to force the validation to run again after the jQuery executes?
View 2 Replies
Mar 4, 2011
I have a createuserwizard which has been working recently. Even though the form has the necessary validation elements like requiredfieldvalidator, comparevalidator and so on, the validation on client side does not fire and form is submitted and saved.I checked twice the code, nothing seemed wrong and have no what might it caused.
View 11 Replies
Dec 25, 2010
I am using one datalist control for uploading multiple images.I hv used one Asp:FileUplaod Control and one button in one itemtemplate.I am using reqired field validator and regular expression validator for file upload cntrl I am assigning validation group for both of them on ItemDataBound event of my datalist so that each upload cntrl hv same validaton group as required field and regular expression validator.Now what i want to do is - i want to show my error message in validation summary which is right at the top of the page.I want one know how to write javascript that will assign validation group of my control in datalist on which i click ?
View 1 Replies
Jun 4, 2010
I've written a custom ASP.net control that descends from LinkButton and overrides the Render() method. I'm using it to replace ImageButtons in the site I'm working on so we don't have to have an image for each button. This control works fine, does the required post-backs etc., however it doesn't fire the validators in its validation group. This is obviously an issue. The code for the control is (condensed) as follows:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public class CustomButton : LinkButton
{
public string SpanCssClass { get; set; }
protected override void Render(HtmlTextWriter writer)
{
if (!Visible)
{
return;
}
writer.AddAttribute(HtmlTextWriterAttribute.Name, UniqueID);
writer.AddAttribute(HtmlTextWriterAttribute.Id, ClientID);
writer.AddAttribute(HtmlTextWriterAttribute.Class, CssClass);
string postback = string.IsNullOrEmpty(OnClientClick) ? "javascript:__doPostBack('" + UniqueID + "','');" : OnClientClick;
writer.AddAttribute(HtmlTextWriterAttribute.Href, postback);
writer.RenderBeginTag(HtmlTextWriterTag.A);
writer.AddAttribute(HtmlTextWriterAttribute.Class, SpanCssClass);
writer.RenderBeginTag(HtmlTextWriterTag.Span);
writer.Write(Text);
writer.RenderEndTag();
writer.RenderEndTag();
}
}
Does anyone know why this would not be causing the validators to fire? I was under the impression that leaving all the other methods in LinkButton un-overridden would leave all the other functionality the same.
View 2 Replies
Nov 10, 2010
Is there a way that I can execute a javascript function after the client side validation occurs in asp.net?I have a couple validation controls on a page and an input button with CausesValidation=true. The OnClientClick handler executes javascript before the validation runs, but i want to run some functions afterwards.
View 1 Replies
Jul 26, 2010
i have the following property which takes an IP address as its value and defined in my custom config section as follows and To validate the IP address i am using a Reg expression.
[ConfigurationProperty("SMTPServer", IsRequired = true, DefaultValue = "0.0.0.0")
View 1 Replies
Mar 7, 2010
Here is the code I have so far:
[code]....
When I click submit, It does the validation on the server side, I kinda like it to validate on the Client instead of taking a trip to the server right away.
View 2 Replies
Feb 24, 2011
Is it possible to do client side validation on a detailsview (insert or edit) without using validation controls? I.E. somehow capture the onClientClick event of the autogenerated Insert/Update link buttons to call my javascript function?
View 1 Replies
Feb 23, 2010
I am using ASP.NET's server-side validation. In the page_load event I'm calling Page.Validate(), and if Page.IsValid is not true I'm then polling the controls to figure out which ones are not valid, and then determining what actions to take.It would be much easier if each control would raise an event as validation fails, allowing me to take action for that particular control. I'm very much a naive programmer when it comes to validation, but is there a way to extend these controls so that a validation error raises an event?
View 1 Replies
Jan 19, 2011
I need to perform a validation to check whether a TextBox value is empty on Dropown list selected Index change using validation controls in asp.net
View 1 Replies
Mar 16, 2011
Let's say that I have the following HTML for a text box on an ASP.NET page:
<div class="myClass">
<asp:TextBox ID="txtMyTextBox" runat="server"></asp:TextBox>
</div>
It is easy enough to add a required field validator to this page like this.
<asp:RequiredFieldValidator ID="valMyTextBox" runat="server" ControlToValidate="txtMyTextBox" ErrorMessage="My Text Box is required."></asp:RequiredFieldValidator>
But I need to modify the HTML slightly if this text box fails validation. I need to add a CSS class to the DIV. So if the user leaves this field blank I need the HTML to look like this:
<div class="myClass error">
<asp:TextBox ID="txtMyTextBox" runat="server"></asp:TextBox>
</div>
Is this possible? I can't figure out if there is a way to write code behind that only fires if this particular validator control fails validation or something. I know I can write code that runs when the entire page is not valid. But I just want this code to run when this validator returns invalid. Hope this makes sense.
View 2 Replies
Jul 14, 2010
While writing a web application Using MS Web Developer 2010 Express, I noticed a rather disconcerting behavior of the asp:DropDownlist control.When using databinding and you assign a DataValueField the selectedIndexChanged does not fire or change unless the value of the DataValueField changes no matter what the value of the DataTextField. This means that if I have several different text values(States/Provinces) with the same datavalue (US/Canada) I cannot fire an event if the text changes (the textchanged does not fire either) as long as the datavalue doesn't change (all States are US all Provinces are CA). This would seem to be a counter intuitive behavior?
[code]...
View 5 Replies
Feb 5, 2011
I have a gridview I fill it when user search items by this code on
btnOk_Click:
[Code]....
Now I want to change one column value in each row I Use this code on
GridView1_RowDataBound:
[Code]....
But GridView1_RowDataBound not fire.
View 4 Replies
Apr 7, 2010
End Sub
asp:GridView ID="Departments" runat="server" AutoGenerateColumns="False" DataKeyNames="EntityID" DataSourceID="AccessDataSource1"
BorderColor="White" BorderWidth="0px" Height="79px" Width="232px">
<Columns>
<asp:BoundField DataField="EntityName" HeaderText="Department"
SortExpression="EntityName" />
<asp:TemplateField>
<ItemTemplate>
--->>> <asp:Button ID="btnJoin" runat="server" CommandArgument="<%# CType(Container,GridViewRow).RowIndex %>"
CommandName="Join" Text="Join" BackColor="#F2F0FF" Font-Bold="True" />
</ItemTemplate>
</asp:TemplateField>
View 3 Replies
Oct 12, 2010
Have been trying this for three days, kersmacking my head against it with no success. Can anyone see why this FormView will not fire a DeleteCommand?
[Code]....
[Code]....
View 4 Replies
May 21, 2010
I want to use a button to fire up the SqlDataSource InsertCommand. how do I do that? do I have to use FormView with 'DefaultMode="Insert" ?
View 2 Replies
Aug 10, 2010
I have implemented a ListView1_ItemCommand, that fires from the following LINKBUTTON on my Listview:
[Code]....
My intention is when i click on the EDIT button on my Listview, it fills the Form with the data retrieved from the DB. If all the fields on this form are EMPTY, then it INSERTS. But if the formīs TEXTBOXES have texts on it, it should call the ListView1_ItemCommand in order to perform the same EDIT.
How do I fire the ListView1_ItemCommand ? Or is there any way better ?
View 6 Replies
Feb 11, 2010
In one webpage,
There is one updatepanel in that one gridview,
there is one dropdown in headerrow of gridview,
dropdown's selectedindexchanged event fire in FireFox but not in IE.
View 7 Replies
Feb 8, 2011
I have a usercontrol that has a gridview. I have a few boundcolumns and then a buttonfield. The buttonfield needs to have a confirm message box and then proceed to the RowCommand event. In the RowCommand, I'm trapping for a CommandName called "DeleteFile".
The weird thing is everything works correctly with deleting a row if the onclick code is not registered. I'm using attributes.add for this.
I know there is another option for using a templatefield and then a button rather than a buttonfield. But, I've noticed that this approach causes a postback that effects another usercontrol on my page. It thinks I've submitted it which can either cause it to error out or potentially sumbit more information which I want to avoid.
[code]....
View 4 Replies
Jun 4, 2010
I have below code: I don't know why DataGrid1_ItemCommand does not fire event.
[code]....
View 2 Replies
Mar 2, 2010
Validation controls are good to use but plz guide is there a way that I can prevent validation controls to be validate on input and force them to validate on button press ?
e. g. In a textbox if a reqular expression validator is applied requirment is to make validator fire on button press not on entering text.
View 12 Replies
Sep 23, 2010
In my web app, I used LinqDataSource, ListView and DataPager (.NET 3.5 sp1) to implement search feature with paging. I have a button to trigger the search.
But In the first time, the Selecting event of LinqDataSource fire twice and I don't know why (I debugged my code very carefully). I don't use QueryString with DataPager and assign PageSize of DataPager in the first time of page load to prevent the ListView bind again (as in some instructions I found in forum)
I can't post my code because it's quite large.
View 5 Replies
