How to validate Gantt field while adding in .NET WebForms application?
In ASP.NET Web Forms Gantt control, it is possible to validate the fields provided by the user while adding or editing the data using action Begin client side event. This event will be triggered with requestType argument as save before saving the data to Gantt, so at this point we can validate the fields with required condition.
The following code example explains the above scenario,
<ej:Gantt ID="Gantt" runat="server"
//...
Load="load" ActionBegin="actionBegin">
<script>
function load (args) {
var columns = this.getColumns();
var column1 = {
field: "ActualDate",
headerText: "Actual Date",
mappingName: "ActualDate",
editType: "datepicker",
},
column2 = {
field: "EstimateDate",
headerText: "Estimate Date",
mappingName: "EstimateDate",
editType: "datepicker",
}
columns.splice(4, 0, column1, column2)
}
function actionBegin(args) {
if (args.requestType == "save") {
if (Date.parse(args.data.ActualDate)>Date.parse(args.data.EstimateDate)) {
args.cancel = true;
window.alert("Actual Date should not be greater than Estimated Date");
}
}
}
</script>
The above example shows on how to validate the custom columns and alert the user if condition fails and cancel the add operation.
Sample link:
The simple sample to validate the Gantt fields while adding/ editing the data is available in the following link. Sample
Note:
A new version of Essential Studio for ASP.NET is available. Versions prior to the release of Essential Studio 2014, Volume 2 will now be referred to as a classic versions.The new ASP.NET suite is powered by Essential Studio for JavaScript providing client-side rendering of HTML 5-JavaScript controls, offering better performance, and better support for touch interactivity. The new version includes all the features of the old version, so migration is easy.
The Classic controls can be used in existing projects; however, if you are starting a new project, we recommend using the latest version of Essential Studio for ASP.NET. Although Syncfusion will continue to support all Classic Versions, we are happy to assist you in migrating to the newest edition.
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