How to pass a report parameter value from client to server in ASP.NET Core ReportViewer?
You can pass report parameter values from client-side to server-side using Syncfusion ASP.NET
ASP.NET Core ReportView. The following steps guide you to send the parameters from client to server using the ‘ajax-before-load’ event.
1.Create a simple ReportViewer application with the help of getting started documentation.
2. Provide the parameter values in client-side and pass as an argument for the ajax-before-load event as shown in the following code snippet.
Index.cshtml
<div style="height: 525px;width: 100%;">
<ej-report-viewer id="reportviewer1" report-service-url="../Home" processing-mode="Local" rendering-begin="renderingBegin" ajax-before-load="ajaxBeforeLoad" />
</div>
<script type="text/javascript">
function ajaxBeforeLoad(event) {
var parameters = [{
name: 'CustomerID',
labels: ['29889'],
values: [29889],
nullable: false
}];
event.data = parameters;
};
</script>
<ej-script-manager></ej-script-manager>
3. Get the client-side parameter values in the controller (HomeController) from CustomData key in jsonResult of PostReportAction as shown in the following code snippet.
HomeController.cs
public partial class HomeController : Controller, IReportController
{
public string DefaultParam = null;
[HttpPost]
public object PostReportAction([FromBody] Dictionary<string, object> jsonResult)
{
if (jsonResult.ContainsKey("CustomData"))
{
//Gets the parameter values specified in client-side
DefaultParam = jsonResult["CustomData"].ToString();
}
return ReportHelper.ProcessReport(jsonResult, this, this._cache);
}
public void OnInitReportOptions(ReportViewerOptions reportOption)
{
string basePath = _hostingEnvironment.WebRootPath;
FileStream inputStream = new FileStream(basePath + @"\ReportsTemplate\Region.rdlc", FileMode.Open, FileAccess.Read);
reportOption.ReportModel.Stream = inputStream;
}
public void OnReportLoaded(ReportViewerOptions reportOption)
{
var parameters = new List<ReportParameter>();
if (DefaultParam != null)
{
parameters = JsonConvert.DeserializeObject<List<ReportParameter>>(DefaultParam);
}
if (parameters != null && parameters.Count > 0)
{
reportOption.ReportModel.DataSources.Clear();
//Updates datasource values based on modified report parameter value
reportOption.ReportModel.DataSources.Add(new ReportDataSource { Name = "StoreSales", Value = StoreSales.GetData(Convert.ToInt32(parameters[0].Values[0])) });
}
}
}
Please download the sample for passing report parameter from client to server side here
Conclusion
I hope you enjoyed learning about how to pass a report parameter value from client to server in ASP.NET Core ReportViewer.
You can refer to our ASP.NET Core ReportView feature tour page to know about its other groundbreaking feature representations and documentation, and how to quickly get started for configuration specifications. You can also explore our ASP.NET Core ReportView example to understand how to create and manipulate data.
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