我在我的 Windows 项目中有报告页面。其中包括microsoftReportViewer。在该页面中，有两个组合框。第一个组合框中的项目是：
- 公司详情
- 奇蒂控股
- 贷款详情。
对应选择combobox1中的这个项目，combobox中的项目会改变。我需要根据2个combbox中的这个值报告。
我的代码就像
if (cbReprt.Text == "FirmDetails")
{
if (cbGeneral.Text == "AllFirmDetails")
{
reportViewer1.RefreshReport();
SqlConnection con = new SqlConnection("Data Source=202.88.231.102;Initial Catalog=dbs_Merchant;Persist Security Info=True;User ID=sa;Password=abc123*");
con.Open();
allfirmdetails ds = new allfirmdetails();
string str = "Select * from View_2";
SqlCommand cmd = new SqlCommand(str, con);
SqlDataAdapter da = new SqlDataAdapter(cmd);
da.Fill(ds);
DataTable dt = new DataTable();
da.Fill(dt);
reportViewer1.ProcessingMode = Microsoft.Reporting.WinForms.ProcessingMode.Local;
reportViewer1.LocalReport.ReportPath = "F:\\MerchantAssociation\\MerchantAssociation\\Report7.rdlc";
reportViewer1.LocalReport.DataSources.Clear();
reportViewer1.LocalReport.DataSources.Add(new Microsoft.Reporting.WinForms.ReportDataSource("allfirmdetails_View_2", dt));
reportViewer1.RefreshReport();
}
else
{
reportViewer1.RefreshReport();
SqlConnection con = new SqlConnection("Data Source=202.88.231.102;Initial Catalog=dbs_Merchant;Persist Security Info=True;User ID=sa;Password=abc123*");
con.Open();
allfirmdetails ds1 = new allfirmdetails();
string str1 = "Select * from View_2 where FirmName='" + cbGeneral.Text + "'";
SqlCommand cmd1 = new SqlCommand(str1, con);
SqlDataAdapter da1 = new SqlDataAdapter(cmd1);
da1.Fill(ds1);
DataTable dt1 = new DataTable();
da1.Fill(dt1);
reportViewer1.ProcessingMode = Microsoft.Reporting.WinForms.ProcessingMode.Local;
reportViewer1.LocalReport.ReportPath = "F:\\MerchantAssociation\\MerchantAssociation\\firmwise.rdlc";
reportViewer1.LocalReport.DataSources.Clear();
reportViewer1.LocalReport.DataSources.Add(new Microsoft.Reporting.WinForms.ReportDataSource("allfirmdetails_View_2", dt1));
reportViewer1.RefreshReport();
}
}
else if (cbReprt.Text == "ChittyDetails")
{
if (cbGeneral.Text == "AllChittyDetails")
{
reportViewer1.RefreshReport();
SqlConnection con = new SqlConnection("Data Source=202.88.231.102;Initial Catalog=dbs_Merchant;Persist Security Info=True;User ID=sa;Password=abc123*");
con.Open();
ChittyDetails ds2 = new ChittyDetails();
string str2 = "Select * from View_1";
SqlCommand cmd2 = new SqlCommand(str2, con);
SqlDataAdapter da2 = new SqlDataAdapter(cmd2);
da2.Fill(ds2);
DataTable dt2 = new DataTable();
da2.Fill(dt2);
reportViewer1.ProcessingMode = Microsoft.Reporting.WinForms.ProcessingMode.Local;
reportViewer1.LocalReport.ReportPath = "F:\\MerchantAssociation\\MerchantAssociation\\allchitty.rdlc";
reportViewer1.LocalReport.DataSources.Clear();
reportViewer1.LocalReport.DataSources.Add(new Microsoft.Reporting.WinForms.ReportDataSource("ChittyDetails_View_1", dt2));
reportViewer1.RefreshReport();
}
首先，我选择 chittyholding 详细信息。然后我拿到了报告。然后我选择 chitty details report，我得到了类似的错误
**An error occured during local report processing .A data sourcr instance has not been supplied for the data source "ChittyHolding_View_7"**。如果我关闭并再次运行该项目，那么该坚定详细信息选择将起作用。但另一个将不起作用。这意味着只有一个选择我才能获得报告。为什么？请解决这个错误