C# 在crystal报表中传递参数
我正在从存储过程创建crytal report,当我传递一个参数时,它可以正常工作,但它显示了一个错误 “参数不正确” 当我传递两个参数时 我的代码是C# 在crystal报表中传递参数,c#,crystal-reports,C#,Crystal Reports,我正在从存储过程创建crytal report,当我传递一个参数时,它可以正常工作,但它显示了一个错误 “参数不正确” 当我传递两个参数时 我的代码是 { ReportDocument reportDocument = new ReportDocument(); ParameterField paramField = new ParameterField(); ParameterFields paramFields = new ParameterFields();
{
ReportDocument reportDocument = new ReportDocument();
ParameterField paramField = new ParameterField();
ParameterFields paramFields = new ParameterFields();
ParameterDiscreteValue paramDiscreteValue = new ParameterDiscreteValue();
paramField.Name = "@Dept";
paramDiscreteValue.Value = TextBox1.Text.ToString();
paramField.CurrentValues.Add(paramDiscreteValue);
paramFields.Add(paramField);
paramField.Name = "@Name";
paramDiscreteValue.Value = TextBox2.Text.ToString();
paramField.CurrentValues.Add(paramDiscreteValue);
paramFields.Add(paramField);
CrystalReportViewer1.ParameterFieldInfo = paramFields;
reportDocument.Load(Server.MapPath("CrystalReport.rpt"));
CrystalReportViewer1.ReportSource = reportDocument;
reportDocument.SetDatabaseLogon("sa", "sa", "OPWFMS-7KYGZ7SB", "test");
}
请让我知道任何更改确保在参数中传递的实际数据未隐式转换为错误的数据类型。与为@Dept参数传递数字ID类似,请确保预期接收值的输入参数的数据类型也是数字类型。您需要为这两个参数创建新的parameterField和value。您当前的代码添加参数,修改它(更改名称和值)并再次添加相同的对象。这应该是正确的:
{
ReportDocument reportDocument = new ReportDocument();
ParameterFields paramFields = new ParameterFields();
// ParameterDiscreteValue paramDiscreteValue = new ParameterDiscreteValue();
ParameterField paramField = new ParameterField();
ParameterDiscreteValue paramDiscreteValue = new ParameterDiscreteValue();
paramField.Name = "@Dept";
paramDiscreteValue.Value = TextBox1.Text.ToString();
paramField.CurrentValues.Add(paramDiscreteValue);
paramFields.Add(paramField);
paramField = new ParameterField(); // <-- This line is added
paramDiscreteValue = new ParameterDiscreteValue(); // <-- This line is added
paramField.Name = "@Name";
paramDiscreteValue.Value = TextBox2.Text.ToString();
paramField.CurrentValues.Add(paramDiscreteValue);
paramFields.Add(paramField);
CrystalReportViewer1.ParameterFieldInfo = paramFields;
reportDocument.Load(Server.MapPath("CrystalReport.rpt"));
CrystalReportViewer1.ReportSource = reportDocument;
reportDocument.SetDatabaseLogon("sa", "sa", "OPWFMS-7KYGZ7SB", "test");
{
ReportDocument ReportDocument=新的ReportDocument();
ParameterFields paramFields=新的ParameterFields();
//ParameterDiscreteValue paramDiscreteValue=新的ParameterDiscreteValue();
ParameterField paramField=新的ParameterField();
ParameterDiscreteValue paramDiscreteValue=新的ParameterDiscreteValue();
paramField.Name=“@Dept”;
paramDiscreteValue.Value=TextBox1.Text.ToString();
paramField.CurrentValues.Add(paramDiscreteValue);
paramFields.Add(paramField);
paramField=new ParameterField();//尝试在添加到报告中的每个参数之前创建ParameterField:
paramField = new ParameterField();
paramDiscreteValue.Value = ...
...
试试这个,它更简洁一点
{
ReportDocument reportDocument = new ReportDocument();
reportDocument.Load(Server.MapPath("CrystalReport.rpt"));
CrystalReportViewer1.ReportSource = reportDocument;
reportDocument.SetParameterValue("@Dept", TextBox1.Text.ToString());
reportDocument.SetParameterValue("@Name", TextBox2.Text.ToString());
// CrystalReportViewer1.ParameterFieldInfo = paramFields;
reportDocument.SetDatabaseLogon("sa", "sa", "OPWFMS-7KYGZ7SB", "test");
}
Crystal Reports for Visual Studio 2005可以复制此问题。解决方法是先设置Crystal ReportViewer的ReportSource属性,然后设置参数值。因此,您的代码应为:
{
ReportDocument reportDocument = new ReportDocument();
CrystalReportViewer1.ReportSource = reportDocument;
ParameterField paramField = new ParameterField();
ParameterFields paramFields = new ParameterFields();
ParameterDiscreteValue paramDiscreteValue = new ParameterDiscreteValue();
paramField.Name = "@Dept";
paramDiscreteValue.Value = TextBox1.Text.ToString();
paramField.CurrentValues.Add(paramDiscreteValue);
paramFields.Add(paramField);
paramField.Name = "@Name";
paramDiscreteValue.Value = TextBox2.Text.ToString();
paramField.CurrentValues.Add(paramDiscreteValue);
paramFields.Add(paramField);
CrystalReportViewer1.ParameterFieldInfo = paramFields;
reportDocument.Load(Server.MapPath("CrystalReport.rpt"));
reportDocument.SetDatabaseLogon("sa", "sa", "OPWFMS-7KYGZ7SB", "test");
}
仅供参考,元音在这里是免费的。不,它不起作用。错误是paramField paramDiscreteValue已经定义了Yup。ParameterDiscreteValue有两个定义。我将额外注释一行。这与以前的错误不同?在哪一行?请发布完整的错误文本。这是编译器错误还是运行时错误?这不是complile time错误报告正在生成,但报告中写有“在正确的参数中”,然后您应该检查代码中的参数名称(@Dept和@Name)与Crystal报表中的参数名称相同。另请检查类型-代码中的两个参数都是字符串,请参阅该报表也需要字符串值。否不起作用。已定义paramField和paramDiscreteValue时出错