ValidationEventArgs.ErrorText Property
Gets or sets the error description.
Namespace: DevExpress.Web
Assembly: DevExpress.Web.v24.2.dll
Declaration
Property Value
| Type | Description |
|---|---|
| String | A String value representing the error description. |
Remarks
The ErrorText property can be used to provide text explaining why validation failed. If the ValidationEventArgs.IsValid property is set to false, the text will be displayed within a specific error frame.
Example
This example demonstrates how to validate editors in a container on the server side. The ASPxEdit.ValidateEditorsInContainer method is used to determine the validity of editors within a callback panel.
<title>How to validate editors in container </title>
<script type="text/javascript" language="javascript">
function Validate(s, e) {
if (ASPxClientEdit.ValidateGroup('testGroup'))
ClientCallbackPanelDemo.PerformCallback('');
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<dx:ASPxButton ID="ASPxButtonSave" runat="server" Text="Validate" AutoPostBack="False">
<ClientSideEvents Click="Validate" />
</dx:ASPxButton>
<br />
<dx:ASPxCallbackPanel ID="ASPxCallbackPanelDemo" runat="server" HideContentOnCallback="False"
ClientInstanceName="ClientCallbackPanelDemo" OnCallback="ASPxCallbackPanelDemo_Callback">
<PanelCollection>
<dx:PanelContent ID="PanelContent1" runat="server">
<table cellspacing="0" cellpadding="4" runat="server" id="serverContainer">
<tr>
<td style="width: 60px;">
<dx:ASPxLabel runat="server" ID="NameLabel" AssociatedControlID="txtNum1" Text="Number 1:" />
</td>
<td>
<dx:ASPxTextBox ID="txtNum1" runat="server" Width="170px" OnValidation="ASPxTextBoxTest_Validation">
<ValidationSettings ValidationGroup="testGroup">
<RequiredField IsRequired="True" ErrorText="Number 1 is required" />
</ValidationSettings>
</dx:ASPxTextBox>
</td>
</tr>
<tr>
<td style="width: 60px;">
<dx:ASPxLabel runat="server" ID="ASPxLabel1" AssociatedControlID="txtNum2" Text="Number 2:" />
</td>
<td>
<dx:ASPxTextBox ID="txtNum2" runat="server" Width="170px" OnValidation="ASPxTextBoxTest_Validation">
<ValidationSettings ValidationGroup="testGroup">
<RequiredField IsRequired="True" ErrorText="Number 2 is required"/>
</ValidationSettings>
</dx:ASPxTextBox>
</td>
</tr>
</table>
</dx:PanelContent>
</PanelCollection>
</dx:ASPxCallbackPanel>
</div>
</form>
</body>
</html>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using DevExpress.Web.ASPxEditors;
using DevExpress.Web.ASPxCallbackPanel;
public partial class _Default : System.Web.UI.Page {
protected void Page_Init (object sender, EventArgs e) {
}
protected void ASPxCallbackPanelDemo_Callback (object sender, DevExpress.Web.CallbackEventArgsBase e) {
ASPxCallbackPanel callbackPanel = (ASPxCallbackPanel)sender;
bool isValid = ASPxEdit.ValidateEditorsInContainer(callbackPanel);
}
protected void ASPxTextBoxTest_Validation (object sender, ValidationEventArgs e) {
ASPxTextBox txt = sender as ASPxTextBox;
int val;
bool result = Int32.TryParse(txt.Text, out val);
e.IsValid = result;
e.ErrorText = "An input value should be a number";
}
}
Related GitHub Examples
The following code snippet (auto-collected from DevExpress Examples) contains a reference to the ErrorText property.
Note
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