C# 字符串参数记录选择公式

首先，我刚刚开始学习报告，所有这些版本的Crystal Report都让我困惑。总之，我在VS2008中使用了内置的Crystal Reports

我跟在后面。我在过滤方面有问题。我需要将两个参数字段应用于我的报告-根据用户类型或用户状态对其进行排序。我在cmb框和它旁边的文本框中有这些按钮，用于输入文本并在单击按钮时过滤报告

当我将过滤代码应用到我的系统时（单击按钮）。加载整个报表而不使用筛选器的初始代码不起作用（在formload上）。它显示一个弹出窗口，要求我输入参数值

过滤器工作得很好。。直到我添加了另一个参数字段并尝试复制效果。我也经历了同样的过程。添加一个参数字段，右键单击>报告>选择公式>记录选择，然后添加另一行。它不起作用 在我的记录选择公式编辑器中，它如下所示

{UserType.UserType} = {?UserType}
{UserStatus.UserStatus} = {?UserStatus}

我相信我不知道如何将其分配给参数字段。我不知道如何使用记录选择公式编辑器

我希望UserType参数字段具有此参数{UserType.UserType}={？UserType} 而UserStatus参数字段具有{UserStatus.UserStatus}={？UserStatus}

我需要帮助，我不知道如何为谷歌恰当地表达我的问题。这是我点击按钮的代码。我知道代码只是重复它自己。如果您知道一种更简单的方法，请提供建议

    private void ShowReport_Btn_Click(object sender, EventArgs e)
    {
        //IF SELECTED
        if (Filter_cmb.SelectedItem.ToString() == "UserType") 
        {
            ReportDocument cryRpt = new ReportDocument();
            TableLogOnInfos crtableLogoninfos = new TableLogOnInfos();
            TableLogOnInfo crtableLogoninfo = new TableLogOnInfo();
            ConnectionInfo crConnectionInfo = new ConnectionInfo();

            cryRpt.Load("D:\\MY_THESIS\\WORKING FILES\\WindowsFormsApplication2\\WindowsFormsApplication2\\Reports\\Crystal Reports\\UsersReport.rpt");
            crConnectionInfo.ServerName = "RITZEL-PC\\SQLEXPRESS";
            crConnectionInfo.UserID = "NNIT-Admin";
            crConnectionInfo.Password = "password";
            crConnectionInfo.DatabaseName = "NNIT DB";

            Tables CrTables = cryRpt.Database.Tables;
            foreach (CrystalDecisions.CrystalReports.Engine.Table CrTable in CrTables)
            {
                crtableLogoninfo = CrTable.LogOnInfo;
                crtableLogoninfo.ConnectionInfo = crConnectionInfo;
                CrTable.ApplyLogOnInfo(crtableLogoninfo);
            }

            ParameterFieldDefinitions crParameterFieldDefinitions;
            ParameterFieldDefinition crParameterFieldDefinition;
            ParameterValues crParameterValues = new ParameterValues();
            ParameterDiscreteValue crParameterDiscreteValue = new ParameterDiscreteValue();

            crParameterDiscreteValue.Value = textBox1.Text;
            crParameterFieldDefinitions = cryRpt.DataDefinition.ParameterFields;
            crParameterFieldDefinition = crParameterFieldDefinitions["UserType"];
            crParameterValues = crParameterFieldDefinition.CurrentValues;

            crParameterValues.Clear();
            crParameterValues.Add(crParameterDiscreteValue);
            crParameterFieldDefinition.ApplyCurrentValues(crParameterValues);

            crystalReportViewer1.ReportSource = cryRpt;
            crystalReportViewer1.Refresh();
        }
        else if (Filter_cmb.SelectedItem.ToString() == "UserStatus") 
        {
            ReportDocument cryRpt = new ReportDocument();
            TableLogOnInfos crtableLogoninfos = new TableLogOnInfos();
            TableLogOnInfo crtableLogoninfo = new TableLogOnInfo();
            ConnectionInfo crConnectionInfo = new ConnectionInfo();

            cryRpt.Load("D:\\MY_THESIS\\WORKING FILES\\WindowsFormsApplication2\\WindowsFormsApplication2\\Reports\\Crystal Reports\\UsersReport.rpt");
            crConnectionInfo.ServerName = "RITZEL-PC\\SQLEXPRESS";
            crConnectionInfo.UserID = "NNIT-Admin";
            crConnectionInfo.Password = "password";
            crConnectionInfo.DatabaseName = "NNIT DB";

            Tables CrTables = cryRpt.Database.Tables;
            foreach (CrystalDecisions.CrystalReports.Engine.Table CrTable in CrTables)
            {
                crtableLogoninfo = CrTable.LogOnInfo;
                crtableLogoninfo.ConnectionInfo = crConnectionInfo;
                CrTable.ApplyLogOnInfo(crtableLogoninfo);
            }

            ParameterFieldDefinitions crParameterFieldDefinitions;
            ParameterFieldDefinition crParameterFieldDefinition;
            ParameterValues crParameterValues = new ParameterValues();
            ParameterDiscreteValue crParameterDiscreteValue = new ParameterDiscreteValue();

            crParameterDiscreteValue.Value = textBox1.Text;
            crParameterFieldDefinitions = cryRpt.DataDefinition.ParameterFields;
            crParameterFieldDefinition = crParameterFieldDefinitions["UserStatus"];
            crParameterValues = crParameterFieldDefinition.CurrentValues;

            crParameterValues.Clear();
            crParameterValues.Add(crParameterDiscreteValue);
            crParameterFieldDefinition.ApplyCurrentValues(crParameterValues);

            crystalReportViewer1.ReportSource = cryRpt;
            crystalReportViewer1.Refresh();
        }

---

您的记录选择公式需要是：

{UserType.UserType} = {?UserType}
AND {UserStatus.UserStatus} = {?UserStatus}

另外，确保每个参数的数据类型都与引用的数据库字段的值匹配