asp.net(c#)水晶報表push模式下怎樣用代碼傳遞參數？

[zhoujianfan]

asp.net(c#)水晶報表push模式下怎樣用代碼傳遞參數？

試了幾次，開始顯示正常，但一刷新就出現 參數丟失 錯誤

[ttg520]

ParameterFields paramFields = new ParameterFields();

ParameterField paramUnitField = new ParameterField();
ParameterDiscreteValue unitDiscreteVal = new ParameterDiscreteValue();
paramUnitField.ParameterFieldName = "PanaUnit";
if (Session["unit"] == null)
{
Session["unit"] = 1;
}
unitDiscreteVal.Value = int.Parse(Session["unit"].ToString());
paramUnitField.CurrentValues.Add(unitDiscreteVal);
paramFields.Add(paramUnitField);

ParameterField paramStartField = new ParameterField();
ParameterDiscreteValue startDateDiscreteVal = new ParameterDiscreteValue();
paramStartField.ParameterFieldName = "startDate";
string startDate = getStartDate(Session["unit"].ToString());
startDateDiscreteVal.Value = startDate;
paramStartField.CurrentValues.Add(startDateDiscreteVal);
paramFields.Add(paramStartField);

ParameterField paramEndField = new ParameterField();
ParameterDiscreteValue endDateDiscreteVal = new ParameterDiscreteValue();
paramEndField.ParameterFieldName = "endDate";
string endDate = getEndDate(Session["unit"].ToString());
endDateDiscreteVal.Value = endDate;
paramEndField.CurrentValues.Add(endDateDiscreteVal);
paramFields.Add(paramEndField);

crView.ParameterFieldInfo = paramFields;

[lr2651]

用cookie session都可以解决

[zhoujianfan]

還真要用到 cookie session 啊，真麻煩

不想只為一個變量而填到DataSet裡

用TextObject的話，不能識別換行符
用FieldObject的話，不能設置DataSource

[zhoujianfan]

暈，還是搞不定
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
TxtHDate1.Attributes.Add("onfocus", "calendar()");
TxtHDate2.Attributes.Add("onfocus", "calendar()");

TxtHDate1.Text = DateTime.Now.ToShortDateString();
TxtHDate2.Text = DateTime.Now.ToShortDateString();
//TxtHDate2.Text = DateTime.Now.AddMonths(+1).ToShortDateString();//後1個月

CrystalReportViewer1.DisplayGroupTree = false;
CrystalReportViewer1.EnableDatabaseLogonPrompt = false;
CrystalReportViewer1.EnableParameterPrompt = false;
CrystalReportViewer1.HasCrystalLogo = false;
CrystalReportViewer1.HasDrillUpButton = false;
CrystalReportViewer1.HasToggleGroupTreeButton = false;
CrystalReportViewer1.HasViewList = false;
CrystalReportViewer1.EnableDrillDown = false;
CrystalReportViewer1.PrintMode = CrystalDecisions.Web.PrintMode.ActiveX;
oCR.PrintOptions.PaperSize = CrystalDecisions.Shared.PaperSize.PaperA4;
oCR.PrintOptions.PaperOrientation = CrystalDecisions.Shared.PaperOrientation.Landscape;

ReportDataBind(TxtHDate1.Text, TxtHDate2.Text);
}
else
{
oCR = (ReportDocument)Session["runCrystal"];
paramFields = (ParameterFields)Session["paramFields"];
CrystalReportViewer1.ReportSource = oCR;
CrystalReportViewer1.ParameterFieldInfo = paramFields;
}

}

在IsPostBack狀態時，CrystalReportViewer1.ParameterFieldInfo = paramFields; 都執行成功了，CrystalReportViewer1.ParameterFieldInfo.Count＝1呀，怎么還是參數丟失呢？

[zhoujianfan]

終於搞清楚了

在 ReportDataBind(TxtHDate1.Text, TxtHDate2.Text);裡
CrystalReportViewer1.ParameterFieldInfo = paramFields;
要放在
CrystalReportViewer1.DataBind();
後面

但為什么第一次正常呢？

[godgreat]

晕，帮你顶