DataValidation.ShowErrorMessage Property

Gets or sets whether to display the error alert when the user input is not valid.

Namespace: DevExpress.Spreadsheet

Assembly: DevExpress.Spreadsheet.v24.1.Core.dll

NuGet Package: DevExpress.Spreadsheet.Core

Declaration

C#

bool ShowErrorMessage { get; set; }

VB.NET

Property ShowErrorMessage As Boolean

Property Value

Type	Description
Boolean	true, to display the alert message if the value is not valid; otherwise, false.

Example

The following code snippet adds a new data validation rule and customizes the error dialog invoked when validation fails for the user’s input.

The customized dialog is shown in the image below.

View Example

DataValidationActions.cs

workbook.LoadDocument("Documents\\DataValidation.xlsx");
Worksheet worksheet = workbook.Worksheets[0];

// Restrict data entry to a 5-digit number.
DataValidation validation = worksheet.DataValidations.Add(worksheet["B4:B11"], DataValidationType.Custom, "=AND(ISNUMBER(B4),LEN(B4)=5)");

// Show error message.
validation.ErrorTitle = "Wrong Employee Id";
validation.ErrorMessage = "The value you entered is not valid. Use 5-digit number for the employee ID.";
validation.ErrorStyle = DataValidationErrorStyle.Information;
validation.ShowErrorMessage = true;

// Highlight data validation ranges.
int[] MyColorScheme = new int[] { 0xFFC4C4, 0xFFD9D9, 0xFFF6F6, 0xFFECEC, 0xE9D3D3 };
for (int i = 0; i < worksheet.DataValidations.Count; i++)
{
    worksheet.DataValidations[i].Range.FillColor = Color.FromArgb(MyColorScheme[i]);
}

DataValidationActions.vb

workbook.LoadDocument("Documents\DataValidation.xlsx")
Dim worksheet As Worksheet = workbook.Worksheets(0)

' Restrict data entry to a 5-digit number.
Dim validation As DataValidation = worksheet.DataValidations.Add(worksheet("B4:B11"), DataValidationType.Custom, "=AND(ISNUMBER(B4),LEN(B4)=5)")

' Show error message.
validation.ErrorTitle = "Wrong Employee Id"
validation.ErrorMessage = "The value you entered is not valid. Use 5-digit number for the employee ID."
validation.ErrorStyle = DataValidationErrorStyle.Information
validation.ShowErrorMessage = True

' Highlight data validation ranges.
Dim MyColorScheme() As Integer = { &HFFC4C4, &HFFD9D9, &HFFF6F6, &HFFECEC, &HE9D3D3 }
For i As Integer = 0 To worksheet.DataValidations.Count - 1
    worksheet.DataValidations(i).Range.FillColor = Color.FromArgb(MyColorScheme(i))
Next i

Related GitHub Examples

The following code snippets (auto-collected from DevExpress Examples) contain references to the ShowErrorMessage property.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

C#

winforms-spreadsheetcontrol-api-part-3/CS/SpreadsheetControl_API_Part03/CodeExamples/DataValidationActions.cs#L125

validation.ErrorStyle = DataValidationErrorStyle.Information;
validation.ShowErrorMessage = true;

spreadsheet-document-api-examples-part3/CS/Spreadsheet_Document_Api_Part_3/CodeExamples/DataValidationActions.cs#L146

validation.ErrorStyle = DataValidationErrorStyle.Information;
validation.ShowErrorMessage = true;

VB.NET

winforms-spreadsheetcontrol-api-part-3/VB/SpreadsheetControl_API_Part03/CodeExamples/DataValidationActions.vb#L104

validation.ErrorStyle = DevExpress.Spreadsheet.DataValidationErrorStyle.Information
validation.ShowErrorMessage = True
' Highlight data validation ranges.

spreadsheet-document-api-examples-part3/VB/Spreadsheet_Document_Api_Part_3/CodeExamples/DataValidationActions.vb#L144

validation.ErrorStyle = DataValidationErrorStyle.Information
validation.ShowErrorMessage = True