问题描述

我有一个包含 2 个数据表的数据集，我需要使用 2 个 sql 请求在水晶报表中显示数据.所以我在我的数据集中创建了 2 个数据表(DataTable1 和 dataTable2)我尝试了这段代码，但它总是执行第二个 sql 请求！！

I have a dataset with 2 datatable aand I need to use 2 sql request to display data in crystal report. So I create 2 datatable in my dataset (DataTable1 and dataTable2) I tried this code but it always execute the second sql request!!

con.ConnectionString = @"connection";

string sql = "MyRequest1";
string sql1 = "MyRequest2";

DataSet1 ds = new DataSet1();  

SqlDataAdapter dad = new SqlDataAdapter(sql, con);
SqlDataAdapter dad1 = new SqlDataAdapter(sql1, con);

dad.Fill(ds.Tables["DataTable1"]);
dad1.Fill(ds.Tables["DataTable2"]);

CrystalReport1 report = new CrystalReport1();

report.SetDataSource(ds.Tables["DataTable2"]);
report.SetDataSource(ds.Tables["DataTable1"]);

crystalReportViewer1.ReportSource = report;

crystalReportViewer1.Refresh();

推荐答案

解决方案是为Dataset中使用的每个DataTable实现一个Datatable方法:以第一个Datatable为例:

the solution is to implement a Datatable Method for each DataTable used in the Dataset: example for the 1st Datatable:

protected DataTable DataTable1()
    {
        string sql = "MyRequest";
        SqlDataAdapter dad = new SqlDataAdapter(sql, con);
        DataSet1 ds = new DataSet1();
        dad.Fill(ds.Tables["NameOfDataTable"]);
        DataTable dt = ds.Tables["NameOfDataTable"];
        return dt;

    }

并在打印按钮中添加以下代码:

and in the print button you add this code:

try {
            DataSet ds = new DataSet();
            DataTable dt1 = DataTable1().Copy(); //the name of the method
            ds.Tables.Add(dt1);
            CrystalReport1 myreport = new CrystalReport1();
            myreport.SetDataSource(ds);
            crystalReportViewer1.ReportSource = myreport;

}
catch (Exception ex)
{
   //code ...
}

成功了:)

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