FastReport扩展类

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 = 0; i < ds.Tables.Count; i++)
            {
                fastReportHelper.MReport.RegisterData(ds.Tables[0], ds.Tables[0].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 > 0)
            {
                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 > 0)
            {
                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。

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原文地址:https://www.cnblogs.com/Joy-et/p/4679101.html