The following example implements custom date validation in Batch Edit mode:
1) Use the BatchEditCardValidating event to check values on the client.
2) Use the CardValidating event to check values on the server.
3) Use the AllowValidationOnEndEdit property to switch between validation modes on the client side. If the variation between the HireDate and BirthDate columns is less than 18, input data is considered invalid and data update is not allowed.
View Example
<script type="text/javascript">
function OnValidation(s, e) {
if (!clientChkb.GetChecked()) {
return;
}
var grid = ASPxClientCardView.Cast(s);
var cellInfo1 = e.validationInfo[grid.GetColumnByField("BirthDate").index];
var cellInfo2 = e.validationInfo[grid.GetColumnByField("HireDate").index];
var years = CheckYears(cellInfo1.value, cellInfo2.value);
if (years == null || years < 18) {
cellInfo1.isValid = false;
cellInfo2.isValid = false;
cellInfo2.errorText = "Invalid difference between Hire Date and Birth Date";
cellInfo1.errorText = "Invalid difference between Hire Date and Birth Date";
} else {
cellInfo1.isValid = true;
cellInfo2.isValid = true;
}
}
function CheckYears(date1, date2) {
if (!date1 || !date2)
return null;
var msecPerYear = 1000 * 60 * 60 * 24 * 365;
var years = (date2.getTime() - date1.getTime()) / msecPerYear;
return years;
}
</script>
<dx:ASPxCheckBox ID="ASPxCheckBox1" runat="server" ClientInstanceName="clientChkb"
Checked="true" Text="ClientValidation">
</dx:ASPxCheckBox>
<dx:ASPxCheckBox runat="server" ID="ASPxCheckBox2" AutoPostBack="true" OnCheckedChanged="ASPxCheckBox2_CheckedChanged" Checked="false" Text="Validate on the Save Changes button click"></dx:ASPxCheckBox>
<dx:ASPxCardView ClientInstanceName="grid" DataSourceID="AccessDataSource1" KeyFieldName="EmployeeID" ID="ASPxCardView1" OnCardValidating="ASPxCardView1_CardValidating" runat="server" AutoGenerateColumns="False">
<SettingsEditing Mode="Batch">
</SettingsEditing>
<Columns>
<dx:CardViewTextColumn FieldName="EmployeeID" ReadOnly="True" VisibleIndex="0">
</dx:CardViewTextColumn>
<dx:CardViewTextColumn FieldName="LastName" VisibleIndex="1">
</dx:CardViewTextColumn>
<dx:CardViewTextColumn FieldName="FirstName" VisibleIndex="2">
</dx:CardViewTextColumn>
<dx:CardViewTextColumn FieldName="Address" VisibleIndex="3">
</dx:CardViewTextColumn>
<dx:CardViewDateColumn FieldName="BirthDate" VisibleIndex="4" Width="120px">
</dx:CardViewDateColumn>
<dx:CardViewDateColumn FieldName="HireDate" VisibleIndex="6" Width="120px">
</dx:CardViewDateColumn>
</Columns>
<CardLayoutProperties>
<Items>
<dx:CardViewCommandLayoutItem HorizontalAlign="Right" ShowNewButton="True">
</dx:CardViewCommandLayoutItem>
<dx:CardViewColumnLayoutItem ColumnName="EmployeeID">
</dx:CardViewColumnLayoutItem>
<dx:CardViewColumnLayoutItem ColumnName="LastName">
</dx:CardViewColumnLayoutItem>
<dx:CardViewColumnLayoutItem ColumnName="FirstName">
</dx:CardViewColumnLayoutItem>
<dx:CardViewColumnLayoutItem ColumnName="Address">
</dx:CardViewColumnLayoutItem>
<dx:CardViewColumnLayoutItem ColumnName="BirthDate">
</dx:CardViewColumnLayoutItem>
<dx:CardViewColumnLayoutItem ColumnName="HireDate">
</dx:CardViewColumnLayoutItem>
<dx:EditModeCommandLayoutItem HorizontalAlign="Right">
</dx:EditModeCommandLayoutItem>
</Items>
</CardLayoutProperties>
<ClientSideEvents BatchEditCardValidating="OnValidation" />
</dx:ASPxCardView>
<asp:AccessDataSource ID="AccessDataSource1" runat="server" DataFile="~/App_Data/nwind.mdb"
SelectCommand="SELECT [EmployeeID], [LastName], [FirstName], [Address], [BirthDate], [HireDate] FROM [Employees]"></asp:AccessDataSource>
using DevExpress.Web;
public partial class _Default : System.Web.UI.Page
{
private bool CheckYears(DateTime hireDate, DateTime birthDate)
{
TimeSpan span = hireDate - birthDate;
if (span.TotalDays / 365 < 18)
return false;
else
return true;
}
void AddError(Dictionary<CardViewColumn, string> errors, CardViewColumn column, string errorText)
{
if (errors.ContainsKey(column)) return;
errors[column] = errorText;
}
protected void ASPxCheckBox2_CheckedChanged(object sender, EventArgs e)
{
ASPxCardView1.SettingsEditing.BatchEditSettings.AllowValidationOnEndEdit = !ASPxCheckBox2.Checked;
}
protected void ASPxCardView1_CardValidating(object sender, ASPxCardViewDataValidationEventArgs e)
{
DateTime birthDate = (DateTime)e.NewValues["BirthDate"];
DateTime hireDate = (DateTime)e.NewValues["HireDate"];
var result = CheckYears(hireDate, birthDate);
if (!result)
{
AddError(e.Errors, ASPxCardView1.Columns["BirthDate"], "Invalid difference between Hire Date and Birth Date");
AddError(e.Errors, ASPxCardView1.Columns["HireDate"], "Invalid difference between Hire Date and Birth Date");
e.CardError = "Correct validation errors";
}
else
{
e.CardError = "Modifications aren't allowed in the online example. </br>If you need to test the data editing functionality, please download the example on your machine and run it locally.";
}
}
}
Imports DevExpress.Web
Partial Public Class _Default
Inherits System.Web.UI.Page
Private Function CheckYears(ByVal hireDate As Date, ByVal birthDate As Date) As Boolean
Dim span As TimeSpan = hireDate.Subtract(birthDate)
If span.TotalDays / 365 < 18 Then
Return False
Else
Return True
End If
End Function
Private Sub AddError(ByVal errors As Dictionary(Of CardViewColumn, String), ByVal column As CardViewColumn, ByVal errorText As String)
If errors.ContainsKey(column) Then
Return
End If
errors(column) = errorText
End Sub
Protected Sub ASPxCheckBox2_CheckedChanged(ByVal sender As Object, ByVal e As EventArgs)
ASPxCardView1.SettingsEditing.BatchEditSettings.AllowValidationOnEndEdit = Not ASPxCheckBox2.Checked
End Sub
Protected Sub ASPxCardView1_CardValidating(ByVal sender As Object, ByVal e As ASPxCardViewDataValidationEventArgs)
Dim birthDate As Date = CDate(e.NewValues("BirthDate"))
Dim hireDate As Date = CDate(e.NewValues("HireDate"))
Dim result = CheckYears(hireDate, birthDate)
If Not result Then
AddError(e.Errors, ASPxCardView1.Columns("BirthDate"), "Invalid difference between Hire Date and Birth Date")
AddError(e.Errors, ASPxCardView1.Columns("HireDate"), "Invalid difference between Hire Date and Birth Date")
e.CardError = "Correct validation errors"
Else
e.CardError = "Modifications aren't allowed in the online example. </br>If you need to test the data editing functionality, please download the example on your machine and run it locally."
End If
End Sub
End Class
<script type="text/javascript">
function OnValidation(s, e) {
if (!clientChkb.GetChecked()) {
return;
}
var grid = ASPxClientCardView.Cast(s);
var cellInfo1 = e.validationInfo[grid.GetColumnByField("BirthDate").index];
var cellInfo2 = e.validationInfo[grid.GetColumnByField("HireDate").index];
var years = CheckYears(cellInfo1.value, cellInfo2.value);
if (years == null || years < 18) {
cellInfo1.isValid = false;
cellInfo2.isValid = false;
cellInfo2.errorText = "Invalid difference between Hire Date and Birth Date";
cellInfo1.errorText = "Invalid difference between Hire Date and Birth Date";
} else {
cellInfo1.isValid = true;
cellInfo2.isValid = true;
}
}
function CheckYears(date1, date2) {
if (!date1 || !date2)
return null;
var msecPerYear = 1000 * 60 * 60 * 24 * 365;
var years = (date2.getTime() - date1.getTime()) / msecPerYear;
return years;
}
</script>
...
<dx:ASPxCheckBox ID="ASPxCheckBox1" runat="server" ClientInstanceName="clientChkb"
Checked="true" Text="ClientValidation">
</dx:ASPxCheckBox>
<dx:ASPxCheckBox runat="server" ID="ASPxCheckBox2" AutoPostBack="true" OnCheckedChanged="ASPxCheckBox2_CheckedChanged" Checked="false" Text="Validate on the Save Changes button click"></dx:ASPxCheckBox>
<dx:ASPxCardView ClientInstanceName="grid" DataSourceID="AccessDataSource1" KeyFieldName="EmployeeID" ID="ASPxCardView1" OnCardValidating="ASPxCardView1_CardValidating" runat="server" AutoGenerateColumns="False">
<SettingsEditing Mode="Batch">
</SettingsEditing>
<Columns>
<dx:CardViewTextColumn FieldName="EmployeeID" ReadOnly="True" VisibleIndex="0">
</dx:CardViewTextColumn>
<dx:CardViewTextColumn FieldName="LastName" VisibleIndex="1">
</dx:CardViewTextColumn>
<dx:CardViewTextColumn FieldName="FirstName" VisibleIndex="2">
</dx:CardViewTextColumn>
<dx:CardViewTextColumn FieldName="Address" VisibleIndex="3">
</dx:CardViewTextColumn>
<dx:CardViewDateColumn FieldName="BirthDate" VisibleIndex="4" Width="120px">
</dx:CardViewDateColumn>
<dx:CardViewDateColumn FieldName="HireDate" VisibleIndex="6" Width="120px">
</dx:CardViewDateColumn>
</Columns>
<CardLayoutProperties>
<Items>
<dx:CardViewCommandLayoutItem HorizontalAlign="Right" ShowNewButton="True">
</dx:CardViewCommandLayoutItem>
<dx:CardViewColumnLayoutItem ColumnName="EmployeeID">
</dx:CardViewColumnLayoutItem>
<dx:CardViewColumnLayoutItem ColumnName="LastName">
</dx:CardViewColumnLayoutItem>
<dx:CardViewColumnLayoutItem ColumnName="FirstName">
</dx:CardViewColumnLayoutItem>
<dx:CardViewColumnLayoutItem ColumnName="Address">
</dx:CardViewColumnLayoutItem>
<dx:CardViewColumnLayoutItem ColumnName="BirthDate">
</dx:CardViewColumnLayoutItem>
<dx:CardViewColumnLayoutItem ColumnName="HireDate">
</dx:CardViewColumnLayoutItem>
<dx:EditModeCommandLayoutItem HorizontalAlign="Right">
</dx:EditModeCommandLayoutItem>
</Items>
</CardLayoutProperties>
<ClientSideEvents BatchEditCardValidating="OnValidation" />
</dx:ASPxCardView>
<asp:AccessDataSource ID="AccessDataSource1" runat="server" DataFile="~/App_Data/nwind.mdb"
SelectCommand="SELECT [EmployeeID], [LastName], [FirstName], [Address], [BirthDate], [HireDate] FROM [Employees]"></asp:AccessDataSource>