Configuring Report Caching

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Produkte ✖Reports.WEB ✖Viewer ✖Engine ✖SQL-Anfragen ✖
This example shows how to configure report caching. Here is three examples of caching report - Default, File, MS SQL: 
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="Configure_Report_Caching.Default" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Configuring Report caching</title>
</head>
<body>
    <h2>Configuring Report Caching</h2>
    <form id="form1" runat="server">
        <br /><a href="/DefaultCache.aspx">Default Cache</a>
        <br /><a href="/FileCache.aspx">File Cache</a>
        <br /><a href="/MSSQLCache.aspx">MS SQL Cache</a>
    </form>
</body>
</html>

Let's start with Default caching. First, create StiDefaultCacheHelper class: 
public class StiDefaultCacheHelper : StiCacheHelper
{
	public override StiReport GetReport(string guid)
	{
		return base.GetReport(guid);
	}

	public override void SaveReport(StiReport report, string guid)
	{
		base.SaveReport(report, guid);
	}

	public override void RemoveReport(string guid)
	{
	base.RemoveReport(guid);
	}
}

Then, create DefaultCache method: 
public DefaultCache() {
	StiWebViewer.CacheHelper = new StiDefaultCacheHelper();
}

Finally, create report loading method: 
protected void StiWebViewer1_GetReport(object sender, StiReportDataEventArgs e)
{
	var report = new StiReport();
	report.Load(Server.MapPath("Reports/SimpleList.mrt"));

	e.Report = report;
}

Next, File caching. First, create StiFileCacheHelper class: 
public class StiFileCacheHelper : StiCacheHelper
{
	public override StiReport GetReport(string guid)
	{
		var path = HttpContext.Server.MapPath(Path.Combine("CacheFiles", guid));
		if (File.Exists(path))
		{
			var report = new StiReport();
			var packedReport = File.ReadAllText(path);
			if (guid.EndsWith(GUID_ReportTemplate)) report.LoadPackedReportFromString(packedReport);
			else report.LoadPackedDocumentFromString(packedReport);

			return report;
		}
		return null;
	}

	public override void SaveReport(StiReport report, string guid)
	{
		var packedReport = guid.EndsWith(GUID_ReportTemplate) ? report.SavePackedReportToString() : report.SavePackedDocumentToString();
		var path = HttpContext.Server.MapPath(Path.Combine("CacheFiles", guid));
		File.WriteAllText(path, packedReport);
	}

	public override void RemoveReport(string guid)
	{
		var path = HttpContext.Server.MapPath(Path.Combine("CacheFiles", guid));
		if (File.Exists(path))
		File.Delete(path);
	}
}

Then, create FileCache method: 
public FileCache()
{
	StiWebViewer.CacheHelper = new StiFileCacheHelper();
}

Finally, create report loading method: 
protected void StiWebViewer1_GetReport(object sender, StiReportDataEventArgs e)
{
	var report = new StiReport();
	report.Load(Server.MapPath("Reports/SimpleList.mrt"));

	e.Report = report;
}

The last, MS SQL caching. First, create StiMSSQLCacheHelper class: 
public class StiMSSQLCacheHelper : StiCacheHelper
{
	// Please use your own database connection
	private string connectionString = @"Data Source=127.0.0.1;Initial Catalog=SampleDB;Integrated Security=False;User ID=******;Password=******;";

	public override StiReport GetReport(string guid)
	{
		var connection = new SqlConnection(connectionString);
		try
		{
			connection.Open();

			var query = $"SELECT Guid, Value FROM ReportCache WHERE Guid='{guid}'";
			var command = new SqlCommand(query, connection);
			var reader = command.ExecuteReader();

			if (reader.HasRows)
			{
				reader.Read();
				var packedReport = reader.GetString(1);
				reader.Close();

				var report = new StiReport();
				if (guid.EndsWith(GUID_ReportTemplate)) report.LoadPackedReportFromString(packedReport);
				else report.LoadPackedDocumentFromString(packedReport);

				return report;
			}
		}
		catch (SqlException ex)
		{
			Console.WriteLine(ex.Message);
		}
		finally
		{
			connection.Close();
		}

		return null;
	}

	public override void SaveReport(StiReport report, string guid)
	{
		var connection = new SqlConnection(connectionString);
		try
		{
			connection.Open();

			var query = $"DELETE FROM ReportCache WHERE Guid='{guid}'";
			var command = new SqlCommand(query, connection);
			command.ExecuteNonQuery();

			var packedReport = guid.EndsWith(GUID_ReportTemplate) ? report.SavePackedReportToString() : report.SavePackedDocumentToString();
			query = $"INSERT INTO ReportCache (Guid, Value) VALUES ('{guid}', '{packedReport}')";
			command = new SqlCommand(query, connection);
			command.ExecuteNonQuery();
		}
		catch (SqlException ex)
		{
			Console.WriteLine(ex.Message);
		}
		finally
		{
			connection.Close();
		}
	}

	public override void RemoveReport(string guid)
	{
		var connection = new SqlConnection(connectionString);
		try
		{
			connection.Open();

			var query = $"DELETE FROM ReportCache WHERE Guid='{guid}'";
			var command = new SqlCommand(query, connection);
			command.ExecuteNonQuery();
		}
		catch (SqlException ex)
		{
			Console.WriteLine(ex.Message);
		}
		finally
		{
			connection.Close();
		}
	}
}

Then, create MSSQLCache method: 
public MSSQLCache()
{
	StiWebViewer.CacheHelper = new StiMSSQLCacheHelper();
}

Finally, create report loading method: 
protected void StiWebViewer1_GetReport(object sender, StiReportDataEventArgs e)
{
	var report = new StiReport();
	report.Load(Server.MapPath("Reports/SimpleList.mrt"));

	e.Report = report;
}

Auf dem Screenshot unten Sie können das Ergebnis des Beispiel-Codes ansehen:

Configuring Report Caching
Auf GitHub ansehen Herunterladen
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