问题描述

我正在 Crystal Reports C# windows 应用程序中处理报表.我从 localhost 服务器获取数据到 Crystal 报表.我的表单中有 2 个 datetimepicker.

I'm working on a report in Crystal Reports C# windows application.i fetch the data from localhost server to crystal report. I have 2 datetimepicker in my form.

datetimepicker1 = dtpfrom

datetimepicker1 = dtpfrom

datetimepicker2 - dtpto

datetimepicker2 - dtpto

水晶报告

现在我想要那个，当在 from 和 to datetimepicker 中选择某个日期时，数据之间的数据显示在水晶报告中，请帮助我解决我不知道如何开始的问题.我正在通过谷歌搜索我没有得到关于水晶报告中 datetimepicker 显示的数据之间的任何信息.有什么想法吗?

Now I want that, when selecting some date in from and the to datetimepicker the between data is show in the crystal report please help me to solve i don't know how to start. i'm searching through googling i didn't get any thing about between data in datetimepicker show in crystal report. Any ideas?

这是我的尝试:

MySqlConnection conn = new MySqlConnection(MyCon);
            CrystalReport1 objcr = new CrystalReport1();
            MySqlDataAdapter da = new MySqlDataAdapter("select * from data where date>='" + DateTime.Parse(dtpfrom.Text) + "' and date<='" + DateTime.Parse(dtpto.Text) + "' ", conn);
            DataTable dt = new DataTable();
            da.Fill(dt);
            objcr.SetDataSource(dt);
            crystalReportViewer1.ReportSource = objcr;
            crystalReportViewer1.RefreshReport();

但我遇到了错误

未处理的类型异常'CrystalDecisions.CrystalReports.Engine.DataSourceException' 发生在 CrystalDecisions.ReportAppServer.DataSetConversion.dll 中

An unhandled exception of type 'CrystalDecisions.CrystalReports.Engine.DataSourceException' occurred in CrystalDecisions.ReportAppServer.DataSetConversion.dll

附加信息:加载数据库信息失败.

Additional information: Failed to load database information.

在线:

objcr.SetDataSource(dt);

推荐答案

@divi

使用 datetimepicker 过滤报告中的数据不是为您的编码完成的

filter data in report using datetimepicker is not done for your coding

执行以下操作:

在字段资源管理器中创建一个新参数fromdate，todate -> 参数字段(右键单击)-> 新建

create a new parameter fromdate, todate in Field Explorer -> Parameter Field(Right Click)-> New

像这样也使今天成为今天

like this make todate also

然后右键单击报告.

选择报表 -> 选择公式 -> 记录...

Select Report -> Selection Formula -> Record...

关注

然后单击该表单中的保存并关闭按钮.

then click save and close button in that form.

知道这一点:

右击报表 -> 数据库 -> 设置数据源位置...

Right Click the report -> Database -> Set Datasource Location...

现在编码

 ReportDocument report = new ReportDocument();
            report.Load("C:\Users\Desktop\CrystalReport1.rpt");

            TableLogOnInfo Table = new TableLogOnInfo();
            ConnectionInfo Connection = new ConnectionInfo();
            Tables Tables;

            ParameterFieldDefinitions Parameters;
            ParameterFieldDefinition Parameter;
            ParameterValues Values = new ParameterValues();
            ParameterDiscreteValue DiscreteValue = new ParameterDiscreteValue();

            DiscreteValue.Value = dateTimePicker1.Text;
            Parameters = report.DataDefinition.ParameterFields;
            Parameter = Parameters["fromdate"];
            Values = Parameter.CurrentValues;

            Values.Clear();
            Values.Add(DiscreteValue);
            Parameter.ApplyCurrentValues(Values);

            DiscreteValue.Value = dateTimePicker2.Text;
            Parameters = report.DataDefinition.ParameterFields;
            Parameter = Parameters["todate"];
            Values = Parameter.CurrentValues;

            Values.Add(DiscreteValue);
            Parameter.ApplyCurrentValues(Values);

            Connection.ServerName = "Your servername in Set Datasource Location";
            Connection.DatabaseName = "Your databasename in Set Datasource Location";
            Connection.UserID = "your username";
            Connection.Password = "your password";

            Tables = report.Database.Tables;
            foreach (CrystalDecisions.CrystalReports.Engine.Table table in Tables)
            {
                Table = table.LogOnInfo;
                Table.ConnectionInfo = Connection;
                table.ApplyLogOnInfo(Table);
            }

            crystalReportViewer1.ReportSource = report;
            crystalReportViewer1.Refresh();

希望这有助于解决您的问题.

Hope This helps to solve your problem.

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