I wrote a simple asp.net code with the asp.net required validator control, the problem is that I only have one submit button called GO, and a dropdownlist that looks for the selection :
clear, submit, cancel.
No matter what option is selected, the required field validation is being fired.
Is there a way to code the page so only when the selected value is Submit it validates?
<asp:TextBox runat="server" id="txtName" />
<asp:RequiredFieldValidator runat="server" id="reqName" controltovalidate="txtName" errormessage="Please enter your name!" />
<br /><br />
<asp:DropDownList ID="dpAction" runat="server">
<asp:ListItem>Submit</asp:ListItem>
<asp:ListItem Value="Reset">Reset</asp:ListItem>
<asp:ListItem>Cancel</asp:ListItem>
</asp:DropDownList>
<asp:Button ID="btnAction" runat="server" onclick="btnAction_Click" Text="Go"
Width="40px" />
You will probably have to use a custom validator, and you would need to write the client side code for it also if you want client side validation.
I'm assuming you have a text box or something else that is required when "dpAction" is set to "Submit"?
So for example you would do something like this in your markup
<asp:CustomValidator id="CustomValidator1" runat="server"
OnServerValidate="TextValidate"
ControlToValidate="TextBox1"
ErrorMessage="Text must be specified if Submit is selected">
and in your code-behind
protected void TextValidate(object source, ServerValidateEventArgs args)
{
args.IsValid = dpAction.SelectedValue == "Submit" && !String.IsNullOrEmpty(textbox1.Text);
}
using "required" attribute.
its new in html 5
you should set ValidationGroup for each Validator!
for all controls that you want to be validated and the button to fire the validation:
and the button must have same validaton group with your validator!
Related
If I leave the checkbox blank and click the submit button, nothing happens. If I check it and hit the submit button, nothing happens.
The javascript fires, I just don't know why no text is displayed and the page doesn't postback.
function ValidateCheckBox(source, args) {
args.IsValid = document.getElementById('<%= cb_confirmation.ClientID%>');
}
Here is the validator:
<asp:CustomValidator runat="server" ID="cb_Validator"
OnServerValidate="CheckBoxRequired_ServerValidate"
CssClass="errorMessage" Display="Static" ErrorMessage="You must select this box to confirm"
Text="***" ClientValidationFunction="ValidateCheckBox">
</asp:CustomValidator>
The checkbox:
<asp:CheckBox ID="cb_confirmation" runat="server" />
And the button that causes validation is
<asp:Button ID="btn_submit" runat="server" Text="Submit" CausesValidation="true"
CssClass="submitButton" onclick="btn_submit_Click"/>
EDIT: The solution was to add a ".checked" to the end of the javascript function.
Hi all I need a required field validator for my textbox..This is my textbox..
<asp:TextBox ID="txtTimeSlotGroupName" runat="server" AutoPostBack="false"
ClientIDMode="Static"></asp:TextBox>
<font color="red">*</font>
<asp:RequiredFieldValidator ID="RequiredFieldValidator_txtTimeSlotGroupName"
runat="server" ControlToValidate="txtTimeSlotGroupName" Display="None"
ErrorMessage="Timeslot Group Required!" ForeColor="Red" InitialValue="0"
ValidationGroup="TimeSlot"></asp:RequiredFieldValidator>
My button:
<asp:Button ID="btnAddTimeSlots" Text="Add Timeslots" CssClass="button"
runat="server" OnClick="btnAddTimeslots_Click" ValidationGroup="TimeSlot"
OnClientClick="javascript:shouldsubmit=true;"/>
I am not getting the error message. Any solutions?
You have to define the Validation Group Of your Textbox too....to make it work
<asp:TextBox ID="txtTimeSlotGroupName" runat="server"
AutoPostBack="false" ValidationGroup="TimeSlot" ClientIDMode="Static"></asp:TextBox>
Remove InitialValue="0" from the RequiredFieldValidator tag, it is not required when you are validating the textbox.
Even I was facing the same issue. Kindly check if any javascript are present on your page. Irrespective of above make use of Page.Validate() method and if(Page.IsValid) in your code. This will automatically force your validation controls and issue will be solved
If two objects have the same id the required field validator Does not work.
You just add ValidationGroup="TimeSlot" in textbox
<asp:TextBox ID="txtTimeSlotGroupName" runat="server" AutoPostBack="false"
ValidationGroup="TimeSlot" ClientIDMode="Static"></asp:TextBox>
I had this same issue... but none of the above answers were the fix for me...
My problem was that I was missing the Page.isValid in my button press method. Below is my button code and the method called by the button.
Button:
<asp:Button ID="btnBtmSave" runat="server" Text="Save" OnClick="btnSave_Click" BtnGroup="save" TabIndex="18" />
Button method:
protected void btnSave_Click(object sender, EventArgs e)
{
if (Page.IsValid)
{
//Logic goes here
}
}
make the same Validation Group Of all your text and Add button and Validation
ValidationGroup="AAA"
and add the code to your save button:
If (Page.IsValid) Then
YOURSQL.Insert()
'or ur code here'
End If
In my case, For button, I was using both client side validation i.e onClientClick="return validate()", and ASP.NET Validation i.e Reguired field Validation (ValidationGroup). Hence the Required field validators were not firing.
I am using asp.net validation controls for validating user input. What i want is to change the label text with the error message generated by the validation control.
<asp:Label ID="Label1" runat="server" Text="Whats your name"></asp:Label>
<asp:TextBox ID="nameB" Width="322px" Height="30px" runat="server"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" ValidationGroup="business" runat="server" ErrorMessage="Please tell us your name." ControlToValidate="nameBuisness" CssClass="errMsg" Display="Dynamic"></asp:RequiredFieldValidator>
Thank you.
One way is to handle the submit-button's OnClientClick-event and call a javascript function like:
<script type="text/javascript">
function displayValidationResult() {
// Do nothing if client validation is not available
if (typeof (Page_Validators) == "undefined") return;
var LblName = document.getElementById('LblName');
var RequiredName = document.getElementById('RequiredName');
ValidatorValidate(RequiredName);
if (!RequiredName.isvalid) {
LblName.innerText = RequiredName.errormessage;
}
}
</script>
<asp:Label ID="LblName" runat="server" Text="Whats your name"></asp:Label>
<asp:TextBox ID="TxtNameBusiness" Width="322px" Height="30px" runat="server"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredName" ValidationGroup="business"
runat="server" ErrorMessage="Please tell us your name." ControlToValidate="TxtNameBusiness"
CssClass="errMsg" Display="None"></asp:RequiredFieldValidator>
<asp:Button ID="BtnSumbit" runat="server" Text="Submit"
OnClientClick="displayValidationResult()" ValidationGroup="business" />
I've used some of the few ASP.NET client validation methods available. I've also renamed your controls to somewhat more meaningful and added a submit-button.
ASP.NET Validation in Depth
If your requirement is that you want to do this validation using the built-in ASP.Net validation controls, then you will need to use the ASP.Net CustomValidator control. This cannot be done using the ASP.Net RequiredFieldValidator control. To do the validation you specified, put a CustomValidator control on on your page so that the markup looks like this:
<asp:Label ID="Label1" runat="server" Text="Whats your name"></asp:Label>
<asp:TextBox ID="nameB" Width="322px" Height="30px" runat="server"></asp:TextBox>
<asp:CustomValidator ID="CustValidator" runat="server" ControlToValidate="nameB"
ValidateEmptyText="true" ErrorMessage="Please tell us your name."
onservervalidate="CustValidator_ServerValidate" Display="none" >**</asp:CustomValidator>
<asp:Button ID="btnSubmit" runat="server" Text="Submit" onclick="btnSubmit_Click" CausesValidation="true" />
You then need to write your custom validator. The server-side validation code looks like this:
protected void CustValidator_ServerValidate(object source, ServerValidateEventArgs args)
{
if (string.IsNullOrWhiteSpace(args.Value))
{
Label1.Text = CustValidator.ErrorMessage;
args.IsValid = false;
}
else
{
Label1.Text = "Whats your name";
args.IsValid = true;
}
}
This custom validator will give you the behavior you desire.
In general when you use a CustomValidator control, you should do both server-side validation (for security) and client-side validation (for a better UI experience). To get client-side validation, you will need to write a client-side function in javascript and/or jQuery to do similar validation and then assign it to the ClientValidationFunction of the custom validator.
Further information on the CustomValidator control can be found in the MSDN documentation.
I have an input button on my page that is dynamically created, every time I press it, it fires the RequiredFieldValidator for the blank field in the email address.
is there a way to ovverride it?
input code:
<input class=\"hledat\" id=\"searchbutton\" type=\"image\" src=\"search-button.gif\" value=\"{0}\" onclick=\"search('{1}');\" onkeypress=\"search('{1}');\"/>"
validator code:
<asp:TextBox runat="server" ID="txtEmail" ClientIDMode="Static" Width="98%" />
<asp:RequiredFieldValidator runat="server" ControlToValidate="txtEmail" ErrorMessage="email"
Display="dynamic" ValidationGroup="newsletter" />
<asp:RegularExpressionValidator runat="server" ControlToValidate="txtEmail" ErrorMessage="email"
ValidationExpression="\w+([-+.']\w+)*#\w+([-.]\w+)*\.\w+([-.]\w+)*" Display="dynamic"
ValidationGroup="newsletter" />
I have an input button on my page that is dynamically created, every
time I press it, it fires the RequiredFieldValidator for the blank
field in the email address. is there a way to ovverride it?
HtmlButton.CausesValidation Property
Mark UP
<button causesvalidation="false" /><button ID="StateQueryButton"
CausesValidation="False"
runat="server">
Submit
</button>
yes, i want it to do a postback
HtmlButton.OnServerClick Method
Code Behind
protected void FancyBtn_Click(object sender, EventArgs e)
{
}
Mark Up
<button causesvalidation="false" /><button ID="StateQueryButton"
CausesValidation="False"
OnServerClick=" FancyBtn_Click"
runat="server" >
Submit
</button>
Make it server side button by writing runat="Server" attribute and make a CausesValidation="true|false" on your requirements. If you do false it will not validate. Do let me know if it solves the problem
try to add runat="server" to input button as shown:
*Note* the runat="server". While asp:button probably renders similarly, if what you really want it an HTML button input, you can use that. Yes, ASP.NET will pick up the value on the server side.**
<input type="button" runat="server" id="btnTest" value="change" onclick="doPostBack('btnTest', '');"/>
I have used a required field validator followed by a regular expression validator but the required field validator is not working.....
<asp:TextBox ID="txtSummary" runat="server" TextMode="MultiLine" Width="700px"
CssClass="txtStyle" Font-Names="Arial" MaxLength="1000"
ValidationGroup="Valtxt" TabIndex="2" Rows="4">
</asp:TextBox>
<asp:RegularExpressionValidator ID="regValSummary" runat="server"
ControlToValidate="txtSummary" Display="Dynamic"
ValidationExpression="[^<>&#!]*" ValidationGroup="Valtxt">
Invalid characters(<>&#!) are not allowed
</asp:RegularExpressionValidator>
<asp:RequiredFieldValidator ID="reqvalSummary" runat="server"
ControlToValidate="txtSummary" ErrorMessage="Summary is required"
ValidationGroup="Valtxt" Display="Dynamic">
</asp:RequiredFieldValidator>
can anyone sees the problem???
The RequiredFieldValidator is triggered by the client side onchange event. It sounds like you're expecting it to be triggered by the onblur event, such that tabbing away from the textbox would fire the validation.
Before jumping to that, I suspect this is what you are seeing and to validate that it's actually working you need to trigger onchange. To do so, enter some text in the textbox, tab away, tab back to it, clear the textbox, then tab away once more. You should now see the RequiredFieldValidator's error message since it's contents have changed.
Back to the onblur issue. To accomplish that behavior you could add the onblur attribute in your code-behind and have it call the ValidatorValidate(...) JavaScript method as follows:
void Page_Load(object sender, EventArgs e)
{
txtSummary.Attributes.Add("onblur", "ValidatorValidate(" + reqvalSummary.ClientID + ")");
}
Alternately, you could accomplish the same thing in markup. First, add this script block:
<script type="text/javascript">
function rfvBlur() {
var rfv = document.getElementById("<%= reqvalSummary.ClientID %>");
ValidatorValidate(rfv);
}
</script>
Second, update the <asp:TextBox.../> markup by adding onblur="rfvBlur()" so that it now looks like this:
<asp:TextBox ID="txtSummary" runat="server" TextMode="MultiLine" Width="700px" CausesValidation="true"
CssClass="txtStyle" Font-Names="Arial" MaxLength="1000" ValidationGroup="Valtxt"
TabIndex="2" Rows="4" onblur="rfvBlur()" />
Yet another option is to validate the entire ValidationGroup by adding the following attribute to your <asp:TextBox.../> markup (no additional script block needed):
onblur="Page_ClientValidate('Valtxt')"
Adding this line to <appSettings> section of web.config worked for me (I had a problem when all validators stopped working when project was upgraded to .NET 4.5):
<add key="ValidationSettings:UnobtrusiveValidationMode" value="None" />
Source:
http://forums.asp.net/t/1876231.aspx?ASP+Net+4+5+Validation+Controls+not+working+with+AJAX+ToolkitScriptManager1
Why don't you change the regular expression of the "RegEx" validator to check if the textbox is empty instead of use another validator?
Anyway probabily you have not specify ValidationGroup="Valtxt" for the button or the control that raise the postback. Just add ValidationGroup="Valtxt" to the button or the server control that raise the post to the page
I put the following at the top of my btn_Click event handler (to prevent further code execution) and upon 'return', the rfv messages show...
Page.Validate("your validation group");
if (!Page.IsValid)
{
return;
}
<asp:TextBox ID="txtSummary" runat="server" TextMode="MultiLine" Width="700px"
CssClass="txtStyle" Font-Names="Arial" MaxLength="1000"
TabIndex="2" Rows="4">
</asp:TextBox>
<asp:RegularExpressionValidator ID="regValSummary" runat="server"
ControlToValidate="txtSummary" ErrorMessage="Invalid characters(<>&#!) are not allowed" Text="*"
ValidationExpression="[^<>&#!]*" ValidationGroup="Valtxt">
</asp:RegularExpressionValidator>
<asp:RequiredFieldValidator ID="reqvalSummary" runat="server"
ControlToValidate="txtSummary" ErrorMessage="Summary is required" Text="*"
ValidationGroup="Valtxt">
</asp:RequiredFieldValidator>