FastReport扩展类

时间:2023-03-08 20:48:24

题记:

最近有在用FastReport进行开发报表工作,当然也有在看书,突然想到可以用书中所写来实现一个fastreport的帮助类。

对于引用第三方类库,我们都会去将这个库在调用前进行相应的封装,也就是所谓的程序提供者模式。对第三方进行封装,当需要改变第三方(使用”第四方“的时候)不会影响到我们先前的实现,只需在程序提供处进行处理就好了。

好了,废话不多说,直接上些干活来:

一、定义基本的实现类

  public class FastReportHelper
{
public FastReport.Report report = null;
public FastReport.Report MReport
{
get
{
return report;
}
set
{
report = value;
}
} public FastReportHelper(string templateFile, string printerName, FastReport.Preview.PreviewControl pc)
{
if (string.IsNullOrEmpty(templateFile))
{
throw new ArgumentNullException("报表模板不能为空!");
}
if (!File.Exists(templateFile))
{
throw new FileNotFoundException(string.Format("报表模板“{0}”不存在!", templateFile));
}
if (!string.IsNullOrEmpty(printerName) && !PrinterInfo.ValidatePrinterIsExist(printerName))
{
throw new Exception(string.Format("打印机“{0}”不存在!"));
}
if (pc != null)
{
report.Preview = pc;
}
report = new FastReport.Report();
report.Load(templateFile);
}
public void Show()
{
if (report != null)
{
report.Prepare();
report.ShowPrepared();
}
}
public void Print()
{
if (report != null)
{ report.PrintPrepared();
report.Print();
}
}
public void Print(PrinterSettings printSettings)
{
if (report != null)
{
this.report.PrintPrepared(printSettings);
this.report.Print();
} }
}

打印所需一般就分为:1、模板;2、数据源、3、打印设置,当然上面的类没有实现打印几份,单面打印还是双面打印等,所以均为默认。如果问我为毛这么写,那么请看下面

二、对基本的实现类进行扩展,从而在调用的时候实现链式编程。

  public static class FastReportExtend
{
public static FastReportHelper RegesterData(this FastReportHelper fastReportHelper, DataSet ds)
{
for (int i = ; i < ds.Tables.Count; i++)
{
fastReportHelper.MReport.RegisterData(ds.Tables[], ds.Tables[].TableName);
} return fastReportHelper;
}
public static FastReportHelper RegesterData(this FastReportHelper fastReportHelper, IEnumerable<object> data, string dataName)
{
fastReportHelper.report.RegisterData(data, dataName);
return fastReportHelper;
}
public static FastReportHelper RegesterData(this FastReportHelper fastReportHelper, DataTable dt, string dtName = "")
{
string name = string.IsNullOrEmpty(dtName) ? dt.TableName : dtName;
fastReportHelper.report.RegisterData(dt, name);
return fastReportHelper;
}
public static FastReportHelper SetParameters(this FastReportHelper fastReportHelper, Dictionary<string, object> dicParameters)
{
if (dicParameters != null || dicParameters.Count > )
{
foreach (KeyValuePair<string, object> item in dicParameters)
{
fastReportHelper.report.SetParameterValue(item.Key, item.Value);
}
}
return fastReportHelper;
}
public static FastReport.Report SetParameters(this FastReport.Report report, Dictionary<string, object> dicParameters)
{
if (dicParameters != null || dicParameters.Count > )
{
foreach (KeyValuePair<string, object> item in dicParameters)
{
report.SetParameterValue(item.Key, item.Value);
}
}
return report;
} }

最后、打印机的获取

 /// <summary>
///
/// </summary>
public class PrinterInfo
{
/// <summary>
/// 判断打印机是否存在
/// </summary>
/// <param name="printerName"></param>
/// <returns></returns>
public static bool ValidatePrinterIsExist(string printerName)
{
foreach (var item in PrinterSettings.InstalledPrinters)
{
if (item == printerName)
return true;
}
return false;
}
/// <summary>
/// 获取默认打印机名称
/// </summary>
/// <returns></returns>
public static string GetDefaultPrinter()
{
return new PrintDocument().PrinterSettings.PrinterName;
}
}

乱来一通,最近在搞vb.net,想屎的心都有了。

洗洗睡吧。