I have two asp buttons on a single page. In the following format
textbox1
required field validator1
button1
textbox2
required filed validator2
button2
if I keep cause validation on both buttons true, then its not firing the server side click event, but I am able to validate these text boxes using required field validators.
If I keep this cause validation on both buttons false, its firing the server side click event, but I am not able to validate these textboxes using required filed validators
Can you please tell me the best solution
Thanks
CausesValidation should be true on both.
What you need to do is set ValidationGroup Button1Validation on the textbox1 validator and button1. Set a ValidationGroup of Button2Validation on the textbox2 validator and button2.
Validation groups separate validation rules into groups so that the groups don't overlap and interfere with each other.
The default behavior of the RequiredFieldValidator is that when you don't insert something into the textbox to which it's coupled, and client side validation is turned on (defaults to true), then it won't posback and as such the server side event never gets hit.
You can turn off the client side validation on the validator control by setting the property EnableClientScript to false:
<asp:RequiredFieldValidator ID="TextBoxRequiredValidator"
ControlToValidate="NumberTextBox"
EnableClientScript="False"
Display="Dynamic"
ErrorMessage="Please enter a value."
Text="*"
runat="server"/>
Taken from the MSDN documentation.
Related
My asp.net page has multiple text-boxes and DropDownLists that all have required-field validators.
My site also has multiple pages that you can move between with the click of a button. (All pages have all the buttons) When a page loads and decide I want to go to a different page without entering information into the form, I click a button to move to a separate page and the validation pops up and I can't change the page, it stops me every time?
Any ideas on how to stop this?
I know you already found a solution, but I just wanted to throw in another method for people to see.
When using validators it is common practice to use ValidationGroups. When a validator belongs to a ValidationGroup, it is only triggered by another control in the validation group. For example:
<asp:TextBox ID="NameBox" runat="server"/>
<asp:RequiredFieldValidator ID="NameVal" ControlToValidate="NameBox"
ValidationGroup="ValSubmit" runat="server"/>
//...More input fields and validators...
<asp:Button ID="SubmitButton" ValidationGroup="ValSubmit" runat="server"/>
Using this method any validators with the "ValSubmit" ValidationGroup will be triggered only by the SubmitButton and not by other controls. Now you don't have to put CausesValidation="false" on EVERYTHING else that causes a postback.
As everyone else had mentioned, set the CausesValidation property to false.
<asp:Button ID="MyButton" Text="Go Back" CausesValidation="False" />
This is straight from the Microsoft Help Page:
By default, page validation is performed when a Button control is clicked. Page validation determines whether the input controls associated with a validation control on the page all pass the validation rules specified by the validation control.
You can specify or determine whether validation is performed on both the client and the server when a Button control is clicked by using the CausesValidation property. To prevent validation from being performed, set the CausesValidation property to false.
Note:
You should set the CausesValidation property to false when you are using the PostBackUrl property to post back to a different page. You should explicitly check validation when posting back to a different page. For an example, see the Remarks section of the PostBackUrl property.
This property is commonly set to false for a reset or clear button to prevent validation from being performed when the button is clicked.
When the value of the CausesValidation property is set to true, you can also use the ValidationGroup property to specify the name of the validation group for which the Button control causes validation.
set property CausesValidation = "false" to the buttons where you don't want to trigger validation
CausesValidation="false" on the button ;)
<asp:Button CausesValidation="True|False" />
Gets or sets a value indicating whether validation is performed when the Button control is clicked.
read more about Button.CausesValidation Property
I am having an issue with the requiredfieldvalidator control not working on an ASP.net page. I have completed the attributes of that field properly, but when I test it, the postback is allowed to happen even if the field in question is blank.
So I want to do server side validation instead. What is the best way to do that? In the event that caused the postback? Also, if I find out the field is blank, how do I get the user back to the screen with all other values they placed on other fields intact and a message saying "This field cannot be blank".
EDIT:
This is the code:
<asp:TextBox ID="fName" TabIndex="1" runat="server" Width="221px" CausesValidation="True"></asp:TextBox>
<asp:RequiredFieldValidator ID="FNameRequiredFieldValidator" runat="server" ControlToValidate="fName" InitialValue="" ErrorMessage="Filter Name cannot be blank." ToolTip="Filter Name cannot be blank.">*</asp:RequiredFieldValidator>
You need to provide the markup for your Button / Link control as well.
The 'CausesValidation' attribute is not supposed to be used on TextBox controls.
The button you click needs to have that attribute set to "True".
Please provide that markup and then I can advise on the alternate server side validation.
To enable Client-side Validation, set the EnableClientScript="true" on the RequiredFieldValidator.
You should also always validate on the server side too. But the RequiredFieldValidator doesn't let you do any special-handling server-side. Just check if Page.IsValid(). This will return false if the field is not supplied.
If you want to do custom validation, use a CustomValidator.
I use ASP.NET and have a Button and a CustomValidator, which has to validate
the button.
<asp:Button ID="saveButton" runat="server" OnClick="SaveButton_Click" Text="Speichern"
CausesValidation="true"/>
<asp:CustomValidator runat="server" ID="saveCValidator" Display="Static"
OnServerValidate="EditPriceCValidator_ServerValidate"
ControlToValidate="saveButton" ErrorMessage="">
When loading the page, I receive the error message:
"Control 'saveButton' referenced by
the ControlToValidate property of
'saveCValidator' cannot be validated."
What might be the problem? I searched on the net, but this didn´t help much.
AFAIK, ControlToValidate property should point to input control or left blank for the CustomValidator control.
A reference from MSDN:
Use the ControlToValidate property to
specify the input control to validate.
This property must be set to the ID of
an input control for all validation
controls except the CustomValidator
control, which can be left blank. If
you do not specify a valid input
control, an exception will be thrown
when the page is rendered. The ID must
refer to a control within the same
container as the validation control.
It must be in the same page or user
control, or it must be in the same
template of a templated control.
The standard controls that can be
validated are:
System.Web.UI.WebControls.DropDownList
System.Web.UI.WebControls.FileUpload
System.Web.UI.WebControls.ListBox
System.Web.UI.WebControls.RadioButtonList
System.Web.UI.WebControls.TextBox
System.Web.UI.HtmlControls.HtmlInputFile
System.Web.UI.HtmlControls.HtmlInputPassword
System.Web.UI.HtmlControls.HtmlInputText
System.Web.UI.HtmlControls.HtmlSelect
System.Web.UI.HtmlControls.HtmlTextArea
You can only use a CustomValidator against Input controls that accept user input:
Client-side validation enhances the
validation process by checking user
input before it is sent to the server.
What you want to do is look here at Button Controls and Validation.
When I called this function to enable a validator from client javascript:
`ValidatorEnable(document.getElementById('<%=valPassportOtherText.ClientID%>'), true); //enable` validation control
the required validation control immediately performed it validation, found the value in the associated text box blank and set focus to the textbox (because SetFocusOnError was set to true). As a result, the side effect was that focus was shifted to the control that was associated with the Validation control, i teh example, txtSpecifyOccupation.
<asp:TextBox ID="txtSpecifyOccupation" runat="server" AutoCompleteType="Disabled"
CssClass="DefaultTextBox DefaultWidth" MaxLength="24" Rows="2"></asp:TextBox>
<asp:RequiredFieldValidator ID="valSpecifyOccupation" runat="server" ControlToValidate="txtSpecifyOccupation"
ErrorMessage="1.14b Please specify your <b>Occupation</b>"
SetFocusOnError="True"> Required</asp:RequiredFieldValidator>
Perhaps there is a way to enable the (required) validator without having it simultaneously perform the validation (at least until the user has tabbed off of it?)
I'd like validation of the txtSpecifyOccupation textbox to occur only on a Page submit or when the user has tabbed of the required txtSpecifyoccupation textbox.
How can I achieve this?
Don't call the ValidatorEnable method. Instead, get a reference to teh validation control and simply set its "enabled" property as desired.
To clear the validation control's error text, set the innerText property to "".
I have 2 DetailsView.
The first one is hidden (display:none) with DefaultMode=Insert, has RequiredFieldValidator
<asp:RequiredFieldValidator ID="valRequireAddedBy" runat="server"
ControlToValidate="txtAddedBy" SetFocusOnError="true"
Text="Your name is required." Display="Dynamic">
</asp:RequiredFieldValidator>
The second one, in edit mode.
When I try to submit it I get an error:
htmlfile: Can't move focus to the
control because it is invisible, not
enabled, or of a type that does not
accept the focus.
Only if i remove the validator from first DetailsView it works.
Can you use the ValidationGroup property on the validators to create two groups, one for each DetailsView? I'm not sure how you're firing the event that causes validation in each case, so I don't know if you can associate a ValidationGroup with the firing control or not...
In your second DetailsView, set CausesValidation property to false
That way your "EditMode" details view won't cause the validation to fire
I guess DetailsView does not expose CausesValidation property, you'd have to deal with it on your DetailsView.UpdateItem event