Question

想法是输入新字段然后在报告中显示它们 http://www.mediafire.com/view/6sla63hpecx2cc9/workflow.PNG mediafire.com/view/1juiekfr5gbk48d/theproplem.GIF

我过滤了DataSet中的表，它假设显示数据，它与DataGridView完美配合，现在我希望找到一种方法来填充报表，其中包含填充数据网格的相同数据集

public partial class bill : Form
{
    SqlConnection cn = new SqlConnection(@"Data Source=.\SQLEXPRESS;AttachDbFilename=G:\I.S\C#\C#(Projects)\Nothin\billingSystem\billingSystem\Store.mdf;Integrated Security=True;User Instance=True");

    public bill(string Cusn,string su,string am,string to,string Di, string Cnum)
    {
        InitializeComponent();
        label1.Text = Cusn;
        label2.Text = su;
        label3.Text = am;
        label4.Text = to;
        label5.Text = Di;
        label6.Text = DateTime.Now.ToString("d/M/yyyy");
        label7.Text = Cnum;
    }

    private void bill_Load(object sender, EventArgs e)
    {
        LoadReport();
    }

    private void LoadReport()
    {

        int R = Convert.ToInt32(label7.Text);

        SqlDataAdapter ADAP = new SqlDataAdapter("Select * from Newbill where Con = '" + R + "'", cn);
        DataSet DS = new DataSet();
        ADAP.Fill(DS, "Store");
        dataGridView1.DataSource = DS.Tables["Store"];



        // TODO: This line of code loads data into the 'DataSet10.NewBill' table. You can move, or remove it, as needed.
        this.NewBillTableAdapter.Fill(this.DataSet10.NewBill, R);
        this.reportViewer1.RefreshReport();

        ReportParameter[] allPar = new ReportParameter[5]; // create parameters array
        ReportParameter parSu = new ReportParameter("Summation", label2.Text);
        ReportParameter parDiscount = new ReportParameter("Discount", label5.Text);
        ReportParameter parDisA = new ReportParameter("DiscountAmount", label3.Text);
        ReportParameter parTotal = new ReportParameter("Total", label4.Text);
        ReportParameter parCus = new ReportParameter("CustomerName", label1.Text);

        allPar[0] = parSu; //assign parameters to parameter array
        allPar[1] = parDiscount;
        allPar[2] = parTotal;
        allPar[3] = parDisA;
        allPar[4] = parCus;

        this.reportViewer1.LocalReport.SetParameters(allPar);
        this.reportViewer1.RefreshReport();
        // TODO: This line of code loads data into the 'DataSet1.NewBill' table. You can move, or remove it, as needed.
        //this.NewBillTableAdapter.Fill(this.DataSet1.NewBill, R, O);
        //this.reportViewer1.RefreshReport();
    }
}

我见过这个：http://www.verious.com/qa/how-can-i-load-datatable-as-report-data-source/

实际上我需要步骤来查看来自数据库的数据和查询以过滤报告中的数据，我在谷歌上找到的所有内容都是这样的：http://www.codeproject.com/Articles/31862/Dynamic-Binding-Of-RDLC-To-ReportViewer但是当插入新字段时它无效。 / p>

怎么样，我尝试刷新数据集以包含表中发生的更改（在我的情况下插入新行“新数据”）但它给了我：

A data source instance has not been supplied for the data source 'DataSet 10_NewBill'.


private void LoadReport()
        {
            int R = Convert.ToInt32(label7.Text);

            this.reportViewer1.LocalReport.DataSources.Clear();
            DataTable dt = new DataTable();
            dt = this.NewBillTableAdapter.GetData(R);

            ReportDataSource rprtDTSource = new ReportDataSource(dt.TableName, dt);

            this.reportViewer1.LocalReport.DataSources.Add(rprtDTSource);
            this.reportViewer1.RefreshReport(); 

            // TODO: This line of code loads data into the 'DataSet10.NewBill' table. You can move, or remove it, as needed.
            this.NewBillTableAdapter.Fill(this.DataSet10.NewBill,R );

            this.reportViewer1.RefreshReport();

            ReportParameter[] allPar = new ReportParameter[5]; // create parameters array
            ReportParameter parSu = new ReportParameter("Summation", label2.Text);
            ReportParameter parDiscount = new ReportParameter("Discount", label5.Text);
            ReportParameter parDisA = new ReportParameter("DiscountAmount", label3.Text);
            ReportParameter parTotal = new ReportParameter("Total", label4.Text);
            ReportParameter parCus = new ReportParameter("CustomerName", label1.Text);

            allPar[0] = parSu; //assign parameters to parameter array
            allPar[1] = parDiscount;
            allPar[2] = parTotal;
            allPar[3] = parDisA;
            allPar[4] = parCus;


            this.reportViewer1.LocalReport.SetParameters(allPar);
            this.reportViewer1.RefreshReport();
        }

和这个

    int R = Convert.ToInt32(label7.Text);
    SqlDataAdapter ADAP = new SqlDataAdapter("Select * from Newbill where Con = '" + R + "'", cn);
    DataSet DS = new DataSet();
    ADAP.Fill(DS, "Store");
    DataTable dt = new DataTable();
    dt.TableName = "Store";
    cn.Open();
    ADAP.Fill(dt);
    reportViewer1.ProcessingMode = ProcessingMode.Local;
    ReportDataSource source = new ReportDataSource("Store", dt);
    reportViewer1.LocalReport.DataSources.Clear();
    reportViewer1.LocalReport.DataSources.Add(source);
    reportViewer1.DataBind();
    reportViewer1.LocalReport.Refresh();
    cn.Close();

它给了我：错误'Microsoft.Reporting.WinForms.ReportViewer'不包含'DataBind'的定义，并且没有扩展方法'DataBind'接受类型'Microsoft.Reporting.WinForms.ReportViewer'的第一个参数可能是结果

那么我在使用时需要什么参考？

Answer 1

首先创建你的rpt对象然后设置数据源请按照以下步骤操作。

CrystalReport1 objRpt = new CrystalReport1();  //create your rpt object
objRpt.SetDataSource(Dataset.Tables["tablename"]);   //set datasource to your rpt.
cryRptViewer.ReportSource = objRpt;  //give rpt object to your crystal report viewer.

Answer 2

我会尝试回答您WinForms和ASP.NET的问题，因为您没有指定您使用的是什么。问题是你在一个空的报告上调用RefreshReport ...它会返回那个;一个空的报告。

赢取表单设置报告数据源

//First Create a `DataSource` for your Report:

ReportDataSource reportDataSource = new ReportDataSource();
reportDataSource.Name = "ReportData"; 
reportDataSource.Value = DS.Tables["Store"];

//Then bind the ReportViewer to that DataSource
this.reportViewer1.LocalReport.SetParameters(allPar);
this.reportViewer1.LocalReport.DataSources.Add(reportDataSource);   //This is what you are missing
this.reportViewer1.RefreshReport();

ASP.Net设置报告数据源

//First Create a `DataSource` for your Report - Same as winforms

ReportDataSource reportDataSource = new ReportDataSource();
reportDataSource.Name = "ReportData"; 
reportDataSource.Value = DS.Tables["Store"];

//Then bind the ReportViewer to that DataSource
this.reportViewer1.LocalReport.SetParameters(allPar);
this.reportViewer1.LocalReport.DataSources.Add(reportDataSource);
this.reportViewer1.DataBind(); //This is the difference in ASP.Net   
this.reportViewer1.RefreshReport();

在您的示例中，您可以整天设置SqlConnection，ReportParameter和DataTable，但除非您将ReportViewer绑定到已填充的{{1}你将什么也得不到。

Answer 3

这是我在将本地RDLC绑定到报表查看器时使用的内容。

// create SqlConnection
        SqlConnection myConnection = new SqlConnection(ConnectionString);
        myCommand.Connection = myConnection;
        SqlDataAdapter da = new SqlDataAdapter(myCommand);

        //get the data
        DataSet data = new DataSet();
        da.Fill(data);

        if (data != null && data.Tables.Count > 0 && data.Tables[0].Rows.Count > 0)
        {
            ReportingServicesReportViewer.Visible = true;
            ltrStatus.Text = string.Empty;

            //provide local report information to viewer
            ReportingServicesReportViewer.LocalReport.ReportPath = Server.MapPath(Report.RDLCPath);

            //bind the report attributes and data to the reportviewer
            ReportDataSource rds = new ReportDataSource("DataSet1", data.Tables[0]);
            ReportingServicesReportViewer.LocalReport.DataSources.Clear();
            ReportingServicesReportViewer.LocalReport.DataSources.Add(rds);
            ReportingServicesReportViewer.LocalReport.Refresh();
        }
        else
        {
            ReportingServicesReportViewer.Visible = false;
            ltrStatus.Text = "No data to display.";
        }

在没有给数据表命名的时候我遇到了问题。您可以检查的另一件事是事件查看器，可能是报告查看器所具有但不显示的异常？

Answer 4

问题是您的DataTable名称（在代码中）与数据集的名称（在报告中）不匹配。您的错误提供了您应该使用的名称。试试这个：

private void LoadReport()
    {
        int R = Convert.ToInt32(label7.Text);

        this.reportViewer1.LocalReport.DataSources.Clear();
        DataTable dt = new DataTable();
        dt = this.NewBillTableAdapter.GetData(R);
        //the DataTable name MUST match the name of the corresponding dataset 
        //   (as it is named in the report)
        dt.TableName = "10_NewBill";

        ReportDataSource rprtDTSource = new ReportDataSource(dt.TableName, dt);

        this.reportViewer1.LocalReport.DataSources.Add(rprtDTSource);
        this.reportViewer1.RefreshReport(); 

        //etc.

ReportViewer不显示数据

4 个答案: