Vb 2016 validating text box

28-Oct-2016 12:24

The maximum length for the Validation Rule property setting is 2048 characters.The maximum length for the Validation Text property setting is 255 characters.The following example creates a validation rule for a field that allows only values over 65 to be entered. If a number less than 65 is entered, a message is displayed. Validation Text = str Valid Text End Function Start Date" str Valid Text = "Enter an End Date that is later than the Start Date." int X = Set Table Validation(str Tbl Name, str Valid Rule, str Valid Text) Function Set Table Validation(str Tbl Name As String, _ str Valid Rule As String, str Valid Text As String) _ As Integer Dim dbs As Database, tdf As Table Def Set dbs = Current Db Set tdf = dbs.

If you want to allow a Null value, add "Is Null" to the validation rule, as in " 8 Or Is Null" and make sure the Required property is set to No.If the date entered isn't in this range, you can display the Validation Text property message: "Start date is incorrect." If you create a control by dragging a field from the field list, the field's validation rule remains in effect, although it isn't displayed in the control's Validation Rule property box in the property sheet.This is because a field's validation rule is inherited by a control bound to that field.For table fields and records, you can also set these properties in Visual Basic by using the DAO Validation Rule property.Microsoft Access automatically validates values based on a field's data type; for example, Microsoft Access doesn't allow text in a numeric field.

If you want to allow a Null value, add "Is Null" to the validation rule, as in " 8 Or Is Null" and make sure the Required property is set to No.If the date entered isn't in this range, you can display the Validation Text property message: "Start date is incorrect." If you create a control by dragging a field from the field list, the field's validation rule remains in effect, although it isn't displayed in the control's Validation Rule property box in the property sheet.This is because a field's validation rule is inherited by a control bound to that field.For table fields and records, you can also set these properties in Visual Basic by using the DAO Validation Rule property.Microsoft Access automatically validates values based on a field's data type; for example, Microsoft Access doesn't allow text in a numeric field. If you restrict the user inputs then when you get the value out from the text box you can be more confident that it is valid.