Web Forms :: How To Use CompareValidator Validation Control
Jan 11, 2011
I have 2 text boxes in which I am comparing the numeric value of one to the other. At first it works fine and I get the appropriate error message. But eventually as i plug in different numbers although I should be getting an error message I stop getting one. Is there something going on behind the scenes to fire the error message than I am unaware of. Also the error message fires some time when the value is less than the value of another control and equal to the value. I only want it to fire when it is less than the value of the other control.
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Similar Messages:
Jun 12, 2010
How to extend a compareValidator so i can check, if user has written some text in ControlToValidate then he must write some text in ControlToCompare too.
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Dec 6, 2010
What is the best way to debug a CompareValidator that always fails the validation? Is there any way to see what the values are that it's comparing to maybe get a clue as to what's going wrong?
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Apr 4, 2010
Using a CompareValidator control in GridView. I am validating a value by comparing it to another value found at different cell at edit time. My code found below and perfectly working as expected. Now, how to further make this code to dynamically work based on a flag (checkbox) found in a third cell?
Via RowDataBound
[Code]....
To elaborate more, here is my pseudo code example
If the FLAG cell is checked then, any input number should pass the validation. The Checkbox value is unchecked by default.
[Code]....
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Jun 3, 2010
I have the following template defined within DetailsView ( DetailsView is bound to object data source ):
<EditItemTemplate>
<asp:TextBox ID="txtReleaseDate" runat="server"
Text='<%# Bind("ReleaseDate", "{0:d}") %>'>
</asp:TextBox>
<asp:CompareValidator ID="valReleaseDateType" runat="server"
ControlToValidate="txtReleaseDate" Type="Date" Operator="DataTypeCheck"
Display="Dynamic" > *
</asp:CompareValidator>
</EditItemTemplate>
Assuming I enter into TextBox txtReleaseDate a date in format month/day/year, then upon clicking an Update or Insert button, a CompareValidator control complains that date format is not valid. But if I enter date in format day/month/year, then object data source throws an exception Cannot convert value of parameter 'releaseDate' from 'System.String' to 'System.DateTime', while CompareValidator doesn't complain. I need the two controls to accept the same date format, so:
a) Since my DB stores date in format day/month/year, the best option would be for ODS to also accept this as valid date format. Can ODS be configured that way?
b)Can CompareValidator be configured to also accept month/day/year format?
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Mar 19, 2010
I am creating dropdown controls in code behind. in some conditions I need to add validation control to dropdowlist. But Validation not firing when I submit button.
If mQuestion.RequiredToAnswer = True Then
Dim mValidator As New RequiredFieldValidator
mValidator.ControlToValidate = mDDL.ID
mValidator.InitialValue = mDDL.Items(0).Text
mValidator.Display = ValidatorDisplay.Dynamic
mValidator.ErrorMessage = "* Required!"
mTableCell.Controls.Add(mValidator)
End If
I have other dropdown controls on aspx page with validation comtrols. Those are working fine. Only when I ddl and validations from code not working?
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Feb 15, 2010
i would like to compare the current date with the date entered by user..however, i'm encountering errors so far..
i tried something like this:
<asp:TextBox id="txtDate1" runat="server" />
<asp:CompareValidator runat="server" ErrorMessage="The date must be greater than today"
ControlToValidate="txtDate1" type="date"
ValuetoCompare="DateTime.Today.ToShortDateString()" />
and i got an error stating that the value of DateTime.Today.ToShortDateString() of the ValueToCompare property of "" cannot be converted to type 'date' i also tried ValueToCompare="DateTime.Now.Date()" and i got the same error message.
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Nov 1, 2010
I am using the File upload control in asp.net
In that control filter option not available at least i need provide the validation for file upload control
like xml, xsls, txt
give me the syntax for the validation.
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Mar 26, 2011
I tried to compare between 2 datetimes (dd/MM/yyyy hh:mm:ss) but not able to. It allows me Type="date" and not datetime.
[Code]....
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Jan 10, 2011
this is my aspx.cs code
[Code]....
on button click i used to validate my dropdownlist i set validation group also.. but its not working why...
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Jan 8, 2010
comparing two dates with comparevalidator
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Apr 26, 2010
How do I validate RequiredFieldValidator/CompareValidator conditionally. I have aded equiredFieldValidator/CompareValidator on date textbox. I want that if textbox1="No" thne it should not validate or compare date text box, if textbox1="Yes" then it should validate.
Is this possible on form submit button or any other way?
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May 20, 2010
i have 2 texztboxes for password function. Now i want to use the customvalidator to compare the 2 textboxes instead of the comparevalidator. I used a cs code like this bloew, but it doesnt work.
[Code]....
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Jan 11, 2010
I have a text for user inputs Date. There is a CompareValidator which is used to compare Date between 2 TextBoxes. User do not need to input separator. After finish inputting value, he presses Tab to call a Javascript function to Format value of this Textbox.
Ex : user inputs
TextBox1 (From) : 01012010 =>Press TAB =>Value : 01/01/2010.
TextBox2 (To) : 01022010 =>Press TAB =>Value : 01/02/2010.
But Compare Validator show Error after cursor leaves the TextBox2. If I choose these values from Date Picker => No problem.
I think Compare Validator is called before onblur event. Is that right?
If it is right, is there any way to do my work?
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Jul 8, 2010
I have two textboxes and a CompareValidator attempting to ensure that TextBox_1 contains a date that comes on or before the one in TextBox_2. When one textbox contains a date in "MM/dd/yyyy" format, and the other uses "M/d/yyyy", and the only difference between the two is a leading zero in the "MM" part, my validator fails to recognize that the dates are equal.
I've solved the problem by using the same format for both, but I'm wondering what's going on.
(I'd post the code, but there are so many layers -- controls using inherited classes, etc. -- that it would be more than a bit difficult to make sense out of ...)
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Feb 2, 2010
I have two textboxes where the user will input integers - i need to do a validation on these textboxes: txtStartIndex should be less than txtEndIndex - this works except with either one of the textboxes is left empty/blank how can i fix this?
<td align="right">
<asp:TextBox ID="txtStartIndex" runat="server" Width="50px"></asp:TextBox>
<asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" ControlToValidate="txtStartIndex" ErrorMessage="*" ValidationExpression="[0-9]*" ToolTip="Numeric Values Only"></asp:RegularExpressionValidator>
<td align="right">
<asp:TextBox ID="txtEndIndex" runat="server" Width="50px"></asp:TextBox>
<asp:RegularExpressionValidator ID="RegularExpressionValidator2" runat="server" ControlToValidate="txtEndIndex"ErrorMessage="*" ValidationExpression="[0-9]*" ToolTip="Numeric Values Only"></asp:RegularExpressionValidator>
<asp:CompareValidator ID="compareValidator1" ControlToValidate="txtEndIndex" ControlToCompare="txtStartIndex"Operator="GreaterThan" Type="Integer" Text="*" runat="server" ToolTip="EndIndex has to be greater than StartIndex" />
</td>
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Mar 12, 2010
When to go for custom validation control and when to do validation in javascript? What are pros and cons of each of them?
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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 ?
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Mar 10, 2010
I have a Gridview with a number of Template fields, where the values are all binded to a DB.
I can handle the validation in the codebehind (C#) fine, as far as that singe control.
BUT
I want the validation to be dependent on one of the controls in a Different TemplateField
ie.
Template A
Template B
Template c
Template B & C dependent on Template A
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Aug 31, 2010
I ve two aspCalendar controls on the website. I would like to perform validation (date from Calendar2 should be greater then date from Calendar 1).
<asp:CompareValidator ID="CompareValidator1" runat="server"
ErrorMessage="CompareValidator"
ControlToValidate="Calendar2"[cod]....
There are a lot examples of validation but with ControlToValidate as textBox or label, What about more complex Controls, is there any way I can tell which property from that control has to be used?
Maybe Client side validation ? But how to do this ?
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Feb 21, 2010
I have a compare validator to validate an entry of course. And so, I set my compare validator to validate a textbox and its type to DOUBLE. Even if I input a double value (i.e. 150.24) on the text box, still the page cannot proceed on the next statement because the error message of the validator always display.
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Aug 31, 2010
I had been doing a type check for Double for an input field on a web page but now I need to allow commas. Can this be done using a CompareValidator or do I need to use a regex validator?
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Nov 9, 2010
I'm trying to get a CompareValidator to work but having a few problems. If the submit button does not run a function it works fine, but the validator does not work if there is a function attached to the button.
Here's the code.
Sub myGo(sender As Object, e As EventArgs)
response.redirect("http://www.google.co.uk")
End Sub
and
<form runat="server">
<asp:TextBox id="txt1" runat="server" /> = <asp:TextBox id="txt2" runat="server" /> <asp:Button OnClick="myGo" Text="not working with onclick" runat="server" /> <asp:Button Text="working button" runat="server" />
<br />
<asp:CompareValidator EnableClientScript="false" id="compval" Display="dynamic" ControlToValidate="txt1" ControlToCompare="txt2" Type="String" Text="Validation Failed!" runat="server" />
</form>
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Jun 7, 2012
Looking for an example that demonstrates usage of different validations with respect to gridview.
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Oct 8, 2010
I have a salary TextBox and an associated CompareValidator, which is setup as follows:
<asp:CompareValidator ... Operator="DataTypeCheck" Type="Currency" />
I fill the TextBox with a formatted string out of the database:
txtSalary.Text = myObject.Salary.ToString("N2")
When a user accesses the page using a French culture (such as fr-ca), the ToString method will put 80 000,00 in the textbox, which is fine.However, any number with a space in it causes the validator to fail, which is not fine. Is there any way to make the CompareValidator work properly with non-US formatted numbers?
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