导航下一页时在 Crystal 报告中获取 "Database Logon Error"

Question

我在 ASP.NET 和 C#（数据集）中为 Crystal 报告开发了以下代码，我在报告中有多个页面，我正确地获得了第一页，但是在导航下一页时我遇到了登录错误。

public partial class WSDayBookReport : System.Web.UI.Page
{
    SQLClass sqlfunc = new SQLClass();
    DayBookDataSet dset = new DayBookDataSet();
    ReportDocument rdoc;
}
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Page_Unload(object sender, EventArgs e)
{
    try
    {
        rdoc.Close();
        rdoc.Dispose();
        rdoc = null;
    }
    catch (Exception ex)
    {
    }
}
public void OpeningStock()
{
    string qry = "select  i.ItemGroupID, ig.ItemGroupCode As ItemGroupCode, Sum(iss.RegularStock) As OpeningStock from ItemStock iss, Item i, ItemGroup ig where ig.ItemGroupID = i.ItemGroupID AND iss.ItemID = i.ItemId group by i.ItemGroupID,ig.ItemGroupCode";
    sqlfunc.GetDataFromDT(dset.ItemGroupStock, qry, "sqlcon");
    var q1 = from igs in dset.ItemGroupStock.AsEnumerable()
             select igs;
    foreach (var res in q1)
    {
        res.ConsumedStock = 0;
        res.ClosingStock = 0;
    }
    dset.AcceptChanges();
    //Response.Write(dset.ItemGroupStock.Rows.Count.ToString() + "=Opening Stock");
}
public void loadUser()
{
    string qry = "select pp.PersonnelParticularID As UserID, pp.PersonnelName As UserName from WineOrder wo, WineOrderDetail wod, PersonnelParticular pp, ItemGroup ig, Item i where pp.PersonnelParticularID = wo.IssuedToPersonnelID AND ig.ItemGroupID = i.ItemGroupID AND i.ItemID = wod.ItemID AND wod.IsOrderCancelled = 0 AND wod.WineOrderId = wo.WineOrderId AND wo.WineOrderDate ='" + Convert.ToDateTime(txtDate.Text).ToString("MM/dd/yyyy") + "' group by pp.PersonnelParticularID,pp.PersonnelName";
    sqlfunc.GetDataFromDT(dset.UserMaster, qry, "sqlcon");
    qry = "select  pp.PersonnelParticularID As UserID,ig.ItemGroupID, sum(wod.OrderQty) As ConsumptionQty from WineOrder wo, WineOrderDetail wod, ItemGroup ig, Item i, PersonnelParticular pp where pp.PersonnelParticularID = wo.IssuedToPersonnelID AND ig.ItemGroupID = i.ItemGroupID AND i.ItemID = wod.ItemID AND wod.IsOrderCancelled = 0 AND wod.WineOrderId = wo.WineOrderId AND wo.WineOrderDate='" + Convert.ToDateTime(txtDate.Text).ToString("MM/dd/yyyy") + "' group by ig.ItemGroupID, pp.PersonnelParticularID";
    sqlfunc.GetDataFromDT(dset.UserConsume, qry, "sqlcon");
}
protected void btnSubmit_Click(object sender, EventArgs e)
{
    dset = new DayBookDataSet();
    OpeningStock();
    loadUser();
    //Deducting new RU Entry after the entered date...
    DataTable dtTemp = new DataTable();
    string qry2 = "select Sum(rs.Quantity) As Qty,i.ItemGroupID from RegularStock rs, Item i where i.ItemID = rs.ItemID AND rs.RSDate>='" + Convert.ToDateTime(txtDate.Text).ToString("MM/dd/yyyy") + "' Group by i.ItemGroupID";
    sqlfunc.GetDataFromDT(dtTemp, qry2, "sqlcon");
    if (dtTemp.Rows.Count > 0)
    {
        for (int i = 0; i < dtTemp.Rows.Count; i++)
        {
            var q5 = from igs in dset.ItemGroupStock.AsEnumerable()
                     where igs.ItemGroupID == Convert.ToInt32(dtTemp.Rows[i][1].ToString())
                     select igs;
            foreach (var res in q5)
            {
                res.OpeningStock -= Convert.ToDecimal(dtTemp.Rows[i][0].ToString());
            }
        }
    }
    //Adding cosumed stock from the entered date.
    dtTemp = new DataTable();
    string qry = "select  ig.ItemGroupID, sum(wod.OrderQty) As ConsumptionQty from WineOrder wo, WineOrderDetail wod, ItemGroup ig, Item i where ig.ItemGroupID = i.ItemGroupID AND i.ItemID = wod.ItemID AND wo.IssuedToPersonnelID is not null AND wod.IsOrderCancelled = 0 AND wod.WineOrderId = wo.WineOrderId AND wo.WineOrderDate>='10-01-2015' group by ig.ItemGroupID";
    sqlfunc.GetDataFromDT(dtTemp, qry, "sqlcon");
    if (dtTemp.Rows.Count > 0)
    {
        for (int i = 0; i < dtTemp.Rows.Count; i++)
        {
            var q5 = from igs in dset.ItemGroupStock.AsEnumerable()
                     where igs.ItemGroupID == Convert.ToInt32(dtTemp.Rows[i][0].ToString())
                     select igs;
            foreach (var res in q5)
            {
                res.OpeningStock += Convert.ToDecimal(dtTemp.Rows[i][1].ToString());
            }
        }
    }
    dset.AcceptChanges();
    var qry10 = from us in dset.UserConsume.AsEnumerable()
                group us by us.ItemGroupID into g
                select new
                {
                    TOTAL = g.Sum(x => x.ConsumptionQty),
                    IG = g.Key
                };
    foreach (var res in qry10)
    {
        //Response.Write(res.IG.ToString() +"-"+res.TOTAL.ToString()+ "----------");
        var qrry = from igs in dset.ItemGroupStock.AsEnumerable()
                   where igs.ItemGroupID == res.IG
                   select igs;
        foreach (var res2 in qrry)
        {
            res2.ClosingStock = res2.OpeningStock - res.TOTAL;
        }
    }
    rdoc = new ReportDocument();
    rdoc.Load(Server.MapPath("~/Report/WSDayBookRpt.rpt"));
    rdoc.SetDataSource(dset);
    CrystalReportViewer1.DataBind();
    CrystalReportViewer1.ReportSource = rdoc;
    CrystalReportViewer1.RefreshReport();
}
}

请帮帮我.. 我曾尝试使用会话，但我无法在第二页之后导航，如果我使用写页码进行导航，它会正常工作...

谢谢和问候，

更新

public partial class WSDayBookReport : System.Web.UI.Page

{
    SQLClass sqlfunc = new SQLClass();
    ReportDocument rdoc = new ReportDocument();
    protected void Page_Load(object sender, EventArgs e)
    {
        if (Page.IsPostBack)
        {
            if (Session["CRpt"] != null)
            {
                rdoc =(ReportDocument) Session["CRpt"];
            }
            CrystalReportViewer1.ReportSource = rdoc;
            CrystalReportViewer1.RefreshReport();
        }
        else
        {
            // 'NOT POSTBACK
        }
    }

    protected void Page_Unload(object sender, EventArgs e)
    {
        if (Session["CRpt"] != null)
        {
            Session.Remove("CRpt");
        }
        Session["CRpt"]=rdoc;
    }

protected void btnSubmit_Click(object sender, EventArgs e)
{
    DayBookDataSet dset = new DayBookDataSet();
    //OpeningStock();
    string qry = "select  i.ItemGroupID, ig.ItemGroupCode As ItemGroupCode, Sum(iss.RegularStock) As OpeningStock from ItemStock iss, Item i, ItemGroup ig where ig.ItemGroupID = i.ItemGroupID AND iss.ItemID = i.ItemId group by i.ItemGroupID,ig.ItemGroupCode";
    sqlfunc.GetDataFromDT(dset.ItemGroupStock, qry, "sqlcon");
    var q1 = from igs in dset.ItemGroupStock.AsEnumerable()
             select igs;
    foreach (var res in q1)
    {
        res.ConsumedStock = 0;
        res.ClosingStock = 0;
    }
    // loadUser();
    qry = "select pp.PersonnelParticularID As UserID, pp.PersonnelName As UserName from WineOrder wo, WineOrderDetail wod, PersonnelParticular pp, ItemGroup ig, Item i where pp.PersonnelParticularID = wo.IssuedToPersonnelID AND ig.ItemGroupID = i.ItemGroupID AND i.ItemID = wod.ItemID AND wod.IsOrderCancelled = 0 AND wod.WineOrderId = wo.WineOrderId AND wo.WineOrderDate='" + Convert.ToDateTime(txtDate.Text).ToString("MM/dd/yyyy") + "' group by pp.PersonnelParticularID,pp.PersonnelName";
    sqlfunc.GetDataFromDT(dset.UserMaster, qry, "sqlcon");
    if (dset.UserMaster.Rows.Count == 0)
    {
        lblStatus.Text = "No Consumption on selected date.";
        CrystalReportViewer1.ReportSource = null;
        if (Session["ssnRdoc"] != null)
        {
            Session.Remove("ssnRdoc");
        }

        return;
    }
    else
    {
        lblStatus.Text = "";
    }

    //user consumption
    qry = "select  pp.PersonnelParticularID As UserID,ig.ItemGroupID, sum(wod.OrderQty) As ConsumptionQty from WineOrder wo, WineOrderDetail wod, ItemGroup ig, Item i, PersonnelParticular pp where pp.PersonnelParticularID = wo.IssuedToPersonnelID AND ig.ItemGroupID = i.ItemGroupID AND i.ItemID = wod.ItemID AND wod.IsOrderCancelled = 0 AND wod.WineOrderId = wo.WineOrderId AND wo.WineOrderDate='" + Convert.ToDateTime(txtDate.Text).ToString("MM/dd/yyyy") + "' group by ig.ItemGroupID, pp.PersonnelParticularID";
    sqlfunc.GetDataFromDT(dset.UserConsume, qry, "sqlcon");
    dset.AcceptChanges();
    ViewState.Add("vsDset", dset);
    //Deducting new RU Entry after the entered date...
    DataTable dtTemp = new DataTable();
    string qry2 = "select Sum(rs.Quantity) As Qty,i.ItemGroupID from RegularStock rs, Item i where i.ItemID = rs.ItemID AND rs.RSDate>='" + Convert.ToDateTime(txtDate.Text).ToString("MM/dd/yyyy") + "' Group by i.ItemGroupID";
    sqlfunc.GetDataFromDT(dtTemp, qry2, "sqlcon");
    if (dtTemp.Rows.Count > 0)
    {
        for (int i = 0; i < dtTemp.Rows.Count; i++)
        {
            var q5 = from igs in dset.ItemGroupStock.AsEnumerable()
                     where igs.ItemGroupID == Convert.ToInt32(dtTemp.Rows[i][1].ToString())
                     select igs;
            foreach (var res in q5)
            {
                res.OpeningStock -= Convert.ToDecimal(dtTemp.Rows[i][0].ToString());
            }
        }
    }
    //Adding cosumed stock from the entered date.
    dtTemp = new DataTable();
    qry = "select  ig.ItemGroupID, sum(wod.OrderQty) As ConsumptionQty from WineOrder wo, WineOrderDetail wod, ItemGroup ig, Item i where ig.ItemGroupID = i.ItemGroupID AND i.ItemID = wod.ItemID AND wo.IssuedToPersonnelID is not null AND wod.IsOrderCancelled = 0 AND wod.WineOrderId = wo.WineOrderId AND wo.WineOrderDate>='" + Convert.ToDateTime(txtDate.Text.Trim()).ToString("MM/dd/yyyy") + "' group by ig.ItemGroupID";
    sqlfunc.GetDataFromDT(dtTemp, qry, "sqlcon");
    if (dtTemp.Rows.Count > 0)
    {
        for (int i = 0; i < dtTemp.Rows.Count; i++)
        {
            var q5 = from igs in dset.ItemGroupStock.AsEnumerable()
                     where igs.ItemGroupID == Convert.ToInt32(dtTemp.Rows[i][0].ToString())
                     select igs;
            foreach (var res in q5)
            {
                res.OpeningStock += Convert.ToDecimal(dtTemp.Rows[i][1].ToString());
            }
        }
    }
    dset.AcceptChanges();
    var qry10 = from us in dset.UserConsume.AsEnumerable()
                group us by us.ItemGroupID into g
                select new
                {
                    TOTAL = g.Sum(x => x.ConsumptionQty),
                    IG = g.Key
                };
    foreach (var res in qry10)
    {
        var qrry = from igs in dset.ItemGroupStock.AsEnumerable()
                   where igs.ItemGroupID == res.IG
                   select igs;
        foreach (var res2 in qrry)
        {
            res2.ClosingStock = res2.OpeningStock - res.TOTAL;
        }
    }
    ViewState.Add("vsDset", dset);
    rdoc.Load(Server.MapPath("~/Report/WSDayBookRpt.rpt"));
    rdoc.SetDataSource(dset);
    CrystalReportViewer1.DataBind();
    CrystalReportViewer1.ReportSource = rdoc;
    CrystalReportViewer1.RefreshReport();
    Session["CRpt"]= rdoc;
}
}

Answer 1

您的 CrystalReportViewer 控件可能丢失了 PostBack 上的 ReportDocument。您必须按照以下方式进行操作：

在页面级别声明您的 ReportDocument 对象

ReportDocument rdoc = new ReportDocument();

在 Page_Load 事件中从 Session 对象加载 ReportDocument

protected void Page_Load(System.Object sender, System.EventArgs e) {
    if (Page.IsPostBack) {
        if (Session.Item("CRpt") != null) {
            rdoc = Session.Item("CRpt");
        }
        CrystalReportViewer1.ReportSource = rdoc;
        CrystalReportViewer1.RefreshReport();
    } else {
        'NOT POSTBACK
        if (Session.Item("CRpt") != null) {
            Session.Remove("CRpt");
        }
        Session.Add("CRpt", rdoc);
    }
}

在 btnSubmit 上创建 ReportDocument 并将其添加到 Session

protected void btnSubmit_Click(object sender, EventArgs e) {

    //Populate Report 
    rdoc.SetDataSource(dset);
    CrystalReportViewer1.ReportSource = rdoc;
    Session.Add("CRpt", rdoc);
}

除此之外，如果您在设置 LogOnInfo 方面需要特定帮助，那么您也可以查看此 SO post Report asking for database login on setting DataTable as DataSource

导航下一页时在 Crystal 报告中获取 "Database Logon Error"

Getting "Database Logon Error" in Crystal Report While Navigating Next Page

c#

asp.net

dataset

crystal-reports