c＃將參數傳遞給crystal報告錯誤“缺少參數值”

Question

我一直在將一個VB應用移植到C＃。 除了這個之外，所有水晶報告都有效 我已經調試，驗證了參數名稱，並按照我在這里找到的信息。 無論我嘗試過什么，我都會收到錯誤“缺少參數值”。 當我嘗試ExportToStream(ExportFormatType.PortableDocFormat)並另存為PDF時，會發生錯誤。 參數都是字符串。 當我調試時，6個未鏈接的參數中的每一個都在rptParams.ContainsKey(def.name)塊內部命中。 有7個子報告只有鏈接參數。

我在設置參數之前設置數據源。

我試過了：

ParameterFieldDefinitions parmFields = rpt.DataDefinition.ParameterFields;
ParameterValues pvals = new ParameterValues();
foreach (ParameterFieldDefinition def in parmFields)
{
    if (!def.IsLinked() && rptParams.ContainsKey(def.Name))
    {
        ParameterDiscreteValue pval = new ParameterDiscreteValue();
        pval.Value = rptParams[def.Name];
        pvals.Add(pval);
        def.ApplyCurrentValues(pvals);
    }
}

這是基於原始的VB代碼：

Dim paramFieldDefs As ParameterFieldDefinitions
Dim paramFieldDef As ParameterFieldDefinition
Dim paramVal As ParameterDiscreteValue
Dim paramVals As New ParameterValues
Dim colStepRepParams As Hashtable
colStepRepParams = cStep.ReportParams

' CREATE A NEW PARAMETERS COLLECTION
paramFieldDefs = rptReport.DataDefinition.ParameterFields()
For Each paramFieldDef In paramFieldDefs
    ' IF EXCLUDES 'PARAMETERS' WHICH LINK MAIN REPORT TO SUB REPORTS
    If Not paramFieldDef.IsLinked Then
        If colStepRepParams.ContainsKey(paramFieldDef.Name) Then
            paramVal = New CrystalDecisions.Shared.ParameterDiscreteValue
            paramVal.Value = colStepRepParams.Item(paramFieldDef.Name)
            paramVals.Add(paramVal)
            paramFieldDef.ApplyCurrentValues(paramVals)
        End If
    End If
Next paramFieldDef

我也嘗試過：

foreach (ParameterFieldDefinition def in parmFields)
{
    if (!def.IsLinked() && rptParams.ContainsKey(def.Name))
    {
        rpt.SetParameterValue(def.Name, rptParams[def.Name]);
    }
}

這是事情的順序：

using (SqlCommand cmd = new SqlCommand(job.sproc, con))
{
    cmd.CommandType = CommandType.StoredProcedure;
    cmd.CommandTimeout = 600; //10 min
    foreach (KeyValuePair<string, string> p in sprParams)
    {
        cmd.Parameters.AddWithValue(p.Key, p.Value);
    }

    SqlDataAdapter da = new SqlDataAdapter(cmd);
    DataSet ds = new DataSet();
    da.Fill(ds);

    ReportDocument rpt = new ReportDocument();
    rpt.Load(Path.Combine(RPT_LOCATION, job.repFileName));
    rpt.Database.Tables[0].SetDataSource(ds.Tables[0]);

    int i = 1;
    foreach (string subReport in job.subReports)
    {
        using (ReportDocument srpt = rpt.OpenSubreport(subReport))
        {
            srpt.SetDataSource(ds.Tables[i++]);
        }

    }
    ParameterFieldDefinitions parmFields = rpt.DataDefinition.ParameterFields;
    ParameterValues pvals = new ParameterValues();
    foreach (ParameterFieldDefinition def in parmFields)
    {
        if (!def.IsLinked() && rptParams.ContainsKey(def.Name))
        {
            ParameterDiscreteValue pval = new ParameterDiscreteValue();
            pval.Value = rptParams[def.Name];
            pvals.Add(pval);
            def.ApplyCurrentValues(pvals);
        }
    }
}

Answer 1

這是我的解決方案部分基於你的...在我的情況下，它終於在戰斗8小時后工作......！

///BEFORE setting DB connection 

ParameterFieldDefinitions parmFields = cr.DataDefinition.ParameterFields;
foreach (ParameterFieldDefinition def in parmFields)
{
   if (!def.IsLinked() )
     {

     switch (def.ValueType)
     {
           case CrystalDecisions.Shared.FieldValueType.StringField:
              cr.SetParameterValue(def.Name, "", def.ReportName);
              break;

           case CrystalDecisions.Shared.FieldValueType.NumberField:
              cr.SetParameterValue(def.Name, 0, def.ReportName);
              break;

           default:
              cr.SetParameterValue(def.Name, null, def.ReportName);
              break;
     }

    }
}
///Now set DB connections 
 ...

///Now set all parameters which INDEED HAVE to be set ...
 ...

迎接sk

Answer 2

skalka：s解決方案適合我，但我沒有任何SubReports

foreach (ParameterFieldDefinition def in doc.DataDefinition.ParameterFields)
        {
            if (!def.IsLinked())
            {

                switch (def.ValueType)
                {
                    case CrystalDecisions.Shared.FieldValueType.StringField:
                        doc.SetParameterValue(def.Name, "");
                        break;

                    case CrystalDecisions.Shared.FieldValueType.NumberField:
                        doc.SetParameterValue(def.Name, 0);
                        break;

                    default:
                        doc.SetParameterValue(def.Name, null);
                        break;
                }

            }
        }

        doc.SetDataSource(table);

// Set parameters as I wanted from the beginning