Validation Server Controls
The CompareValidator control is used to compare the value of one input control to the value of another input control or to a fixed value.
Note: If the input control is empty, the validation will succeed. Use the RequiredFieldValidator control to make the field required.
| Property | Description |
|---|---|
| BackColor | The background color of the CompareValidator control |
| ControlToCompare | The name of the control to compare with |
| ControlToValidate | The id of the control to validate |
| Display | The display behavior for the validation control. Legal values are:
|
| EnableClientScript | A Boolean value that specifies whether client-side validation is enabled or not |
| Enabled | A Boolean value that specifies whether the validation control is enabled or not |
| ErrorMessage | The text to display in the ValidationSummary control when validation fails. Note: This text will also be displayed in the validation control if the Text property is not set |
| ForeColor | The foreground color of the control |
| id | A unique id for the control |
| IsValid | A Boolean value that indicates whether the control specified by ControlToValidate is determined to be valid |
| Operator | The type of comparison to perform. The operators are:
|
| runat | Specifies that the control is a server control. Must be set to "server" |
| Text | The message to display when validation fails |
| Type | Specifies the data type of the values to compare. The types are:
|
| ValueToCompare | A specified value to compare with |
CompareValidator
Declare two TextBox controls, one Button control, and one CompareValidator control in an .aspx file. If
validation fails, the text "Validation Failed!" will be displayed in red on a yellow background in the CompareValidator control.
CompareValidator 2
Declare two TextBox controls, one ListBox control, one Button control, and one CompareValidator control in an .aspx file. The check_operator() function sets
the operator of the CompareValidator control equal to the selected operator in the ListBox control, then it validates the CompareValidator control. If
validation fails, the text "Validation Failed!" will be displayed in red on a yellow background in the CompareValidator control.
Validation Server Controls
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