Validation in imagebutton, button not occuring - c#

In my project, validation is not occurring at button_click and imagebutton_click. Why could it be so?
I also gave same validation group to all validators and button and also CAUSEVALIDATION "true" in button
Please help solve this.

Add validation group to image button too and check. Also check if your image button has image in it. Other wise it will not fire events
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<asp:TextBox ID="txt_password" runat="server" CssClass="text_box_password" TextMode="Password" Width="180px"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ControlToValidate="txt_password" ErrorMessage="*" ValidationGroup="aaaa">**</asp:RequiredFieldValidator>
**

Related

ValidationGroup Not Firing

I have a text box with required field validator:-
<asp:TextBox ID="txtCName" runat="server"></asp:TextBox>
<asp:RequiredFieldValidator ID="rfvCName" runat="server" ErrorMessage="Pleas Enter Name" ControlToValidate="txtCName" ></asp:RequiredFieldValidator>
I need to show error message on button click:-
<asp:Button ID="btnSubmit" runat="server" Text="Submit" OnClick="btnSubmit_Click"
ValidationGroup="sub">
I am using the following code to assign validation group to the required field validator (it is in document.ready() function) :-
$("#<%=rfvCName.ClientID %>").attr('ValidationGroup', 'sub');
But it is not showing any error message on button click. Please help me.
I need to do it using Jquery. I don't want to assign ValidatioGroup directly to the control.
Add validation group ValidationGroup="Sub"
<asp:RequiredFieldValidator ID="rfvCName" runat="server" ErrorMessage="Pleas Enter Name" ValidationGroup="sub" ControlToValidate="txtCName" ></asp:RequiredFieldValidator>
when the page(server side) prerender the object requiredFieldValidator, some javascript is added into page automatically by .net framework.
this javascrript code check the validationgroup.
add manually the validationgroup attribute client-side without this javascript code not work.
you can see this code in developpers tool searching "ValidationGroup"
if you cannot add attribute in html, you can add this attribute in a event server side like load or prerender.

TextBox issue populating after postback [duplicate]

I am using ASP.NET and C# couple text boxes to calculate results entered. Textbox2 has a value entered and on button click Textbox1 gets populated. This works fine the first time I enter the value. But the second time I change the value in Textbox2, I see that the value is being assigned to Textbox1 while debugging on Button click, but doesn't show up on the screen. I have many other controls and a master page. The textboxes are within an update panel.
Can someone help me what's going on?
Here is the code:
<asp:TextBox ID="Textbox1" runat="server" Width="150px" TabIndex="6" MaxLength="8"></asp:TextBox> <asp:RequiredFieldValidator ID="RequiredFieldValidator7" runat="server" ControlToValidate="TextBox1" ErrorMessage="*"></asp:RequiredFieldValidator>
<asp:TextBox runat="server" ID="Textbox2" Width="150px" Visible="false"></asp:TextBox>&nbsp
<asp:ImageButton runat="server" ID="imgCalcAdjRate" ImageUrl="~/Resource/Images/calrate_0.bmp" onmouseout="this.src='../Resource/Images/calrate_0.bmp'" onmouseover="this.src='../Resource/Images/calrate_1.bmp'" Height="25px" Width="25px" Visible="false" onclick="imgCalcAdjRate_Click" />
Check the postback in the page_load function.
if(!Page.IsPostBack) {
}
I think you are loosing information on post back. The data is changed, but it get reset on post back.

How to validate expression on button click in asp.net C#

I am making a website and I have made a form fields like email field and validation expressions associated with it. Validation is initiated on text change. But i want it t execute on "submit" button click event.
I have searched but could not locate the solution to my problem. Please tel me why is this happening and how can i make it right. I am new to this web development field, So need help from you guys.
Thanks in advance!!!
Hamad
You could disable showing errors in the validator itself and instead make a validation summary which will be shown only after you click submit.
Like this:
<asp:RequiredFieldValidator runat="server" ControlToValidate="txtEmail" ValidationGroup="vRegister" Display="None" ErrorMessage="Email field cannot be empty"></asp:RequiredFieldValidator>
and then declare a validation summary:
<asp:ValidationSummary runat="server" ID="vSummary" ValidationGroup="vRegister" DisplayMode="BulletList" />
What you should do is change the value of EnableClientScript to false. Then call the validation from your code behind (which should always be done since a user can disable their client side validation anyway. Security rule 1, never trust the client)
EnableClientScript: Gets or sets a value indicating whether client-side validation is enabled.
<asp:TextBox ID="txtName" runat="server"></asp:TextBox>
<asp:RequiredFieldValidator ID="rfvName" runat="server" EnableClientScript="false"
ErrorMessage="*" ControlToValidate="txtName" ></asp:RequiredFieldValidator>
Code Behind:
protected void btnSave_Click(object sender, EventArgs e)
{
if (Page.IsValid)
{
//Do stuff
}
//No need for else, the validations should display accordingly
}
Additional resources: http://weblogs.asp.net/rajbk/archive/2007/03/15/page-isvalid-and-validate.aspx
Are you simply looking for the validation type controls to validate input?
If so look at the property EnableValidation and set it to true. Doing so will force the validation of the textbox even before the button_Click event can execute.
Try this:
<asp:TextBox ID="txtName" runat="server" Height="23px"
Width="252px"></asp:TextBox>
<asp:RequiredFieldValidator ID="rfvName" runat="server"
ErrorMessage="*" ControlToValidate="txtName"
ValidationGroup="vadd"></asp:RequiredFieldValidator>
The "Causes Validation" property on the button itself will automatically force your page to meet you validation specifications before firing the rest of the code associated with the button press.
If i have understood your question, you need to create a same validation group for each of the validation control in your aspx page. You also need to have a validation summary with same validation group. And atlast in the submit button in aspx page you have to mention same validation group...

Required field validator stopping image button onclick?

I'm having an issue with an image button that I have built. When I attach required field validators to the page, they stop the button onclick event from firing. I am pretty perplexed by this as I can't see any issues in my code!
Please could you cast your eyes over this and help me out?
Cheers
<asp:TextBox ID="TB_Newsletter" runat="server" CssClass="nwsltr-input"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" ValidationGroup="V1" runat="server" Display="Dynamic" ControlToValidate="TB_Newsletter" ErrorMessage="You must enter your email address"></asp:RequiredFieldValidator>
<asp:RegularExpressionValidator ID="RegularExpressionValidator1"
runat="server" ValidationGroup="V1" Display="Dynamic"
ValidationExpression="^([0-9a-zA-Z]([-.\w]*[0-9a-zA-Z])*#([0-9a-zA-Z][-\w]*[0-9a-zA-Z]\.)+[a-zA-Z]{2,9})$"
ErrorMessage="Invalid Email Address" ControlToValidate="TB_Newsletter"></asp:RegularExpressionValidator>
<asp:ImageButton ID="IB_SubScri"
ImageUrl="~/_includes/images/buttons/nwsltr-btn.png" runat="server"
onclick="IB_SubScri_Click" CausesValidation="True" ValidationGroup="V1"/>
When you press the button it submits the form, but prior to that the field validators are firing by script - the form won't post if validation fails. <asp:Imagebutton /> and <asp:Button /> types allow you to disable validation when they are pressed:
<asp:ImageButton ... CausesValidation="False"/>
From MSDN on the CausesValidation property:
true if the control causes validation
to be performed on any controls
requiring validation when it receives
focus; otherwise, false. The default
is true.
See this MSDN reference for more information.
Obviously, we assume here that the validator firing when pressing this button is not required.
Change "CausesValidation" to False on your ImageButton

button and validators

I have a Table with two textboxes. Every textbox has a required validator to make the user insert data in the textbox.
I also have a Login table to confirm user privilages.
When I submit the button of login, the validators from the first table appear and prevent the user from logging in. I changed the login button property (Causes validation ) to false, but the validators which I added in the login table didn't appear.
So please how can I solve this problem.
I think you can solve your problem by using ValidationGroups. Here is an excerpt from a page with a longer explanation for you:
This page has two groups – a “Group1” and a “Group2” of validators. There are then two buttons on the page – when button1 is clicked, the first group of validators will fire. When button2 is clicked, the second group of validators will fire. Postback will be blocked client-side by default if the validation fails:
<html>
<body>
<form runat=“server”>
<asp:textbox id=“TextBox1” runat=“server”/>
<asp:requiredfieldvalidator ValidationGroup=“Group1”
ErrorText=“Need to Fill in Value!”
ControlToValidate=“TextBox1”
runat=“server”/>
<asp:textbox id=“TextBox2” runat=“server”/>
<asp:requiredfieldvalidator ValidationGroup=“Group2”
ErrorText=“Need to Fill in Value!”
ControlToValidate=“TextBox2”
runat=“server”/>
<asp:button text=“Group1” ValidationGroup=“Group1” runat=“server”/>
<asp:button text=“Group2” ValidationGroup=“Group2” runat=“server”/>
</form>
</body>
</html>
What you need to use is a ValidationGroup attribute on both the buttons and the validations. This allows certain actions to only enforce a subset of validators on the page when the button is clicked.
<asp:TextBox ID="txtA" runat="server" />
<asp:RequiredFieldValidator ID="rfvA" runat="server" ErrorMessage="Message." ControlToValidate="txtA" ValidationGroup="A" />
<asp:Button ID="btnA" runat="server" Text="A" ValidationGroup="A" />
<asp:TextBox ID="txtB" runat="server" />
<asp:RequiredFieldValidator ID="rfvB" runat="server" ErrorMessage="Message." ControlToValidate="txtA" ValidationGroup="B" />
<asp:Button ID="btnB" runat="server" Text="B" ValidationGroup="B" />
Now when btnA is clicked, it will only check whether rfvA is valid (checking txtA) and when btnB is clicked, it will only check whether rfvB is valid. And yes you can have multiple validation controls in the same validation group.
When you set the CausesValidation property to false, you were disabling all validation actions for the button, not just the ones you didn't want on.

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