Spread for ASP.NET 8.0 Product Documentation
Using Validation Controls
Spread for ASP.NET 8.0 Product Documentation > Developer's Guide > Customizing with Cell Types > Using Validation Controls

You can prevent a user from entering invalid characters in a cell by using a validation control in the Spread cell.

Initialize the validation control and then add the validation control to the Spread cell.

You can use validation controls instead of the standard validation by setting the Validators property.  The following cell types provide this option:

If the validation fails, the onErrorMessageShown event occurs and the user cannot change the active cell. 

The validation is not supported if the ShowEditor property is true.

If you receive an error such as, "UnobtrusiveValidationMode requires a ScriptResourceMapping for 'jquery'" in Visual Studio 2012, then you may need to add the following information to web.config.

<appSettings>
<add key="ValidationSettings:UnobtrusiveValidationMode" value="None"/>
</appSettings>

Using Code

  1. Add the validator code to the ASPX page.  
  2. Create the cell.
  3. Create a validator.
  4. Create validation messages.
  5. Set the Validators property.

Example

This example creates a cell and assigns a basic validator to the cell.

Code
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<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ErrorMessage="RequiredFieldValidator"></asp:RequiredFieldValidator>
  <asp:CompareValidator ID="CompareValidator1" runat="server" ErrorMessage="CompareValidator"></asp:CompareValidator>
  <asp:RangeValidator ID="RangeValidator1" runat="server" ErrorMessage="RangeValidator"></asp:RangeValidator>
C#
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protected void Page_Load(object sender, System.EventArgs e)
{
if (IsPostBack) return;
FpSpread1.Sheets[0].RowCount = 10;
FpSpread1.Sheets[0].ColumnCount = 7;
// RequiredFieldValidator, from code
FarPoint.Web.Spread.TextCellType txt1 = new FarPoint.Web.Spread.TextCellType();
RequiredFieldValidator rfv = new RequiredFieldValidator();
rfv.ErrorMessage = "RequiredFieldValidator, from code: value required!";
txt1.Validators.Add(rfv);
FpSpread1.ActiveSheetView.Cells[0, 0].Text = "RequiredFieldValidator, from code";
FpSpread1.ActiveSheetView.Cells[0, 1].CellType = txt1;

// RequiredFieldValidator, from toolbox
FarPoint.Web.Spread.TextCellType txt2 = new FarPoint.Web.Spread.TextCellType();
RequiredFieldValidator1.ErrorMessage = "RequiredFieldValidator, from toolbox: value required!";
txt2.Validators.Add(RequiredFieldValidator1);
FpSpread1.ActiveSheetView.Cells[1, 0].Text = "RequiredFieldValidator, from toolbox";
FpSpread1.ActiveSheetView.Cells[1, 1].CellType = txt2;

// CompareValidator, from toolbox
FarPoint.Web.Spread.TextCellType txt3 = new FarPoint.Web.Spread.TextCellType();
CompareValidator1.ErrorMessage = "CompareValidator, from toolbox: password does not match! Enter \"Spread\"";
CompareValidator1.ValueToCompare = "Spread";
txt3.Validators.Add(CompareValidator1);
FpSpread1.ActiveSheetView.Cells[2, 0].Text = "CompareValidator, from toolbox";
FpSpread1.ActiveSheetView.Cells[2, 1].CellType = txt3;

// CompareValidator, from code
FarPoint.Web.Spread.TextCellType txt4 = new FarPoint.Web.Spread.TextCellType();
CompareValidator cv = new CompareValidator();
cv.ErrorMessage = "CompareValidator, from toolbox: password does not match! Enter \"Spread\"";
cv.ValueToCompare = "Spread";
txt4.Validators.Add(cv);
FpSpread1.ActiveSheetView.Cells[3, 0].Text = "CompareValidator, from code";
FpSpread1.ActiveSheetView.Cells[3, 1].CellType = txt4;

// RangeValidator, from toolbox
FarPoint.Web.Spread.TextCellType txt5 = new FarPoint.Web.Spread.TextCellType();
RangeValidator1.ErrorMessage = "RangeValidator, from toolbox: value should in range [10 - 15]";
RangeValidator1.MinimumValue = "10"; RangeValidator1.MaximumValue = "15";
RangeValidator1.Type = ValidationDataType.Integer;
txt5.Validators.Add(RangeValidator1);
FpSpread1.ActiveSheetView.Cells[4, 0].Text = "RangeValidator, from toolbox";
FpSpread1.ActiveSheetView.Cells[4, 1].CellType = txt5;

// RangeValidator, from code
FarPoint.Web.Spread.TextCellType txt6 = new FarPoint.Web.Spread.TextCellType();
RangeValidator rv = new RangeValidator();
rv.ErrorMessage = "RangeValidator, from toolbox: value should in range [10 - 15]";
rv.MinimumValue = "10"; rv.MaximumValue = "15";
rv.Type = ValidationDataType.Integer;
txt6.Validators.Add(rv);
FpSpread1.ActiveSheetView.Cells[5, 0].Text = "RangeValidator, from toolbox";
FpSpread1.ActiveSheetView.Cells[5, 1].CellType = txt6;
}
VB
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Protected Sub Page_Load(sender As Object, e As System.EventArgs)
If IsPostBack Then
 Return
End If
FpSpread1.Sheets(0).RowCount = 10
FpSpread1.Sheets(0).ColumnCount = 7
' RequiredFieldValidator, from code
Dim txt1 As New FarPoint.Web.Spread.TextCellType()
Dim rfv As New RequiredFieldValidator()
rfv.ErrorMessage = "RequiredFieldValidator, from code: value required!"
txt1.Validators.Add(rfv)
FpSpread1.ActiveSheetView.Cells(0, 0).Text = "RequiredFieldValidator, from code"
FpSpread1.ActiveSheetView.Cells(0, 1).CellType = txt1

' RequiredFieldValidator, from toolbox
Dim txt2 As New FarPoint.Web.Spread.TextCellType()
RequiredFieldValidator1.ErrorMessage = "RequiredFieldValidator, from toolbox: value required!"
txt2.Validators.Add(RequiredFieldValidator1)
FpSpread1.ActiveSheetView.Cells(1, 0).Text = "RequiredFieldValidator, from toolbox"
FpSpread1.ActiveSheetView.Cells(1, 1).CellType = txt2

' CompareValidator, from toolbox
Dim txt3 As New FarPoint.Web.Spread.TextCellType()
CompareValidator1.ErrorMessage = "CompareValidator, from toolbox: password does not match! Enter ""Spread"""
CompareValidator1.ValueToCompare = "Spread"
txt3.Validators.Add(CompareValidator1)
FpSpread1.ActiveSheetView.Cells(2, 0).Text = "CompareValidator, from toolbox"
FpSpread1.ActiveSheetView.Cells(2, 1).CellType = txt3

' CompareValidator, from code
Dim txt4 As New FarPoint.Web.Spread.TextCellType()
Dim cv As New CompareValidator()
cv.ErrorMessage = "CompareValidator, from toolbox: password does not match! Enter ""Spread"""
cv.ValueToCompare = "Spread"
txt4.Validators.Add(cv)
FpSpread1.ActiveSheetView.Cells(3, 0).Text = "CompareValidator, from code"
FpSpread1.ActiveSheetView.Cells(3, 1).CellType = txt4

' RangeValidator, from toolbox
Dim txt5 As New FarPoint.Web.Spread.TextCellType()
RangeValidator1.ErrorMessage = "RangeValidator, from toolbox: value should in range [10 - 15]"
RangeValidator1.MinimumValue = "10"
RangeValidator1.MaximumValue = "15"
RangeValidator1.Type = ValidationDataType.[Integer]
txt5.Validators.Add(RangeValidator1)
FpSpread1.ActiveSheetView.Cells(4, 0).Text = "RangeValidator, from toolbox"
FpSpread1.ActiveSheetView.Cells(4, 1).CellType = txt5

' RangeValidator, from code
Dim txt6 As New FarPoint.Web.Spread.TextCellType()
Dim rv As New RangeValidator()
rv.ErrorMessage = "RangeValidator, from toolbox: value should in range [10 - 15]"
rv.MinimumValue = "10"
rv.MaximumValue = "15"
rv.Type = ValidationDataType.[Integer]
txt6.Validators.Add(rv)
FpSpread1.ActiveSheetView.Cells(5, 0).Text = "RangeValidator, from toolbox"
FpSpread1.ActiveSheetView.Cells(5, 1).CellType = txt6
End Sub
See Also
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