无法启用此约束,因为并非所有值在c#中都有相应的父值?
我试图在嵌套的gridview中填充数据。我收到此错误无法启用此约束,因为并非所有值在c#中都有相应的父值?,c#,winforms,gridview,devexpress,C#,Winforms,Gridview,Devexpress,我试图在嵌套的gridview中填充数据。我收到此错误无法启用此约束,因为并非所有值都具有相应的父值。我的错误是什么? 帮我解决这个问题 这是我的密码 validateDept.InitializeConnection(); OleDbConnection connection = new OleDbConnection(validateDept.connetionString); OleDbDataAdapter AdapterCustomer
无法启用此约束,因为并非所有值都具有相应的父值
。我的错误是什么?
帮我解决这个问题
这是我的密码
validateDept.InitializeConnection();
OleDbConnection connection = new OleDbConnection(validateDept.connetionString);
OleDbDataAdapter AdapterCustomers = new OleDbDataAdapter(
"SELECT EmployeeId, FirstName FROM Employee", connection);
OleDbDataAdapter AdapterInvoices = new OleDbDataAdapter(
"SELECT InvoiceId, InvoiceNumber, InvoiceDate, SalesPerson AS EmployeeId, Customername AS CustomerId, (Select CustomerName from Customer where Customer.CustomerId = NewInvoice_1.CustomerName) AS Customer_Name, DueDate, Tax, GrandTotal, CompanyId, InvoiceStatus FROM NewInvoice_1", connection);
DataSet dataSet11 = new DataSet();
//Create DataTable objects for representing database's tables
AdapterCustomers.Fill(dataSet11, "Employee");
AdapterInvoices.Fill(dataSet11, "Invoices");
//Set up a master-detail relationship between the DataTables
DataColumn keyColumn = dataSet11.Tables["Employee"].Columns["EmployeeId"];
DataColumn foreignKeyColumn = dataSet11.Tables["Invoices"].Columns["EmployeeId"];
dataSet11.Relations.Add("CustomerInvoice", keyColumn, foreignKeyColumn); // Getting error on this row
//Bind the grid control to the data source
gridControl1.DataSource = dataSet11.Tables["Employee"];
gridControl1.ForceInitialize();
//Assign a CardView to the relationship
GridView cardView1 = new GridView(gridControl1);
gridControl1.LevelTree.Nodes.Add("CustomerInvoice", cardView1);
//Specify text to be displayed within detail tabs.
cardView1.ViewCaption = "Invoice List of a Customer";
//Create columns for the detail pattern View
cardView1.PopulateColumns(dataSet11.Tables["Invoices"]);
提前谢谢。
Srihari多亏了我解决的所有问题,才出现了这个错误,因为数据库中Employee表中的EmployeeId和Invoice表中的EmployeeId不匹配。在更改/匹配两个表中的确切Id后,现在工作正常。多亏了我所解决的所有问题,导致该错误的原因是数据库中Employee表中EmployeeId与Invoice表中EmployeeId不匹配。在更改/匹配两个表中的确切Id后,现在工作正常。多亏了我所解决的所有问题,导致该错误的原因是数据库中Employee表中EmployeeId与Invoice表中EmployeeId不匹配。在更改/匹配两个表中的确切Id后,现在工作正常。多亏了我所解决的所有问题,导致该错误的原因是数据库中Employee表中EmployeeId与Invoice表中EmployeeId不匹配。在更改/匹配两个表中的确切Id后,现在工作正常