Tài liệu Finding, Filtering, and Sorting Rows in a DataTable ppt
Tài liệu Finding, Filtering, and Sorting Rows in a DataTable ppt
... orderDetailsDataTable .Rows. Find(orderDetails); Filtering and Sorting DataRow Objects in a DataTable To filter and sort the DataRow objects in a DataTable, you use the Select() method of your DataTable. ... DESC", DataViewRowState.OriginalRows); foreach (DataRow myDataRow in productDataRows) { foreach (DataColumn myDataColumn in productsDataTable.Columns) { Console.WriteLine(myDataColumn ... Order Details DataTable // to the OrderID and ProductID columns DataTable orderDetailsDataTable = myDataSet.Tables["Order Details"]; orderDetailsDataTable.Constraints.Add( "Primary...
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Tài liệu Selecting the Top n Rows in a DataTable doc
... field in descending order; this places [ Team LiB ] Recipe 3.10 Selecting the Top n Rows in a DataTable Problem You want to create a grid that shows the t op five rows in a DataTable, based ... values in one of the columns. Solution Use an appropriate sort order with a DataView filter. The sample code contains two event handlers: Form.Load Sets up the sample by creating a DataTable ... records at the top of the view. Next, get the Freight value for the nth record and set the DataView filter to contain only rows with a Freight value greater than or equal to that value. Add the appropriate...
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Tài liệu Finding Rows in a DataTable ppt
... return an array of DataRow objects matching the specified filter criteria. By default, the rows in the array are ordered by the primary key or, lacking a primary key, by the order in which the rows ... ConfigurationSettings.AppSettings["Sql_ConnectString"]); DataTable dt = new DataTable( ORDERS_TABLE); da.Fill(dt); da.FillSchema(dt, SchemaType.Source); // Bind the table to the grid. dataGrid.DataSource ... private void FindDataTableRowsForm_Load(object sender, System.EventArgs e) { // Fill the Orders table. SqlDataAdapter da = new SqlDataAdapter("SELECT * FROM Orders", ConfigurationSettings.AppSettings["Sql_ConnectString"]);...
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Tài liệu Accessing Deleted Rows in a DataTable pptx
... the DataTable, use an overload of the Select( ) method of the DataTable to return an array of deleted DataRow objects. The overload accepts an argument having a DataViewRowState enumeration value. ... Deleted rows from the DataTable, use an overload of the Select( ) method of the DataTable to return an array of deleted DataRow objects. The overload accepts an argument having a DataViewRowState ... called. Unchanged The data in the row has not been changed since it was loaded or since AcceptChanges( ) was last called. When AcceptChanges( ) is called on the DataSet, DataTable, or DataRow,...
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Tài liệu Debugging C and C++ code in a Unix environment ppt
... called An example makefile in Appendix A for a wayto track dependencies automatically.• Basic semantic bugs, such as using uninitialised variables, dead code3 and certain type problems. A compiler ... thesection called Using the compiler’s features.Explicit storage allocation and deallocation In C and C++, you have to explicitly allocate and deallocate dynamic storage through malloc and free(for ... C and C++codeSystem call tracers A system call tracer is a program that allows you to see what system calls (including parameters and return values) a process makes. It allows you to examine...
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Tài liệu Where Personal/Desktop Firewalls Fit in a Network pptx
... firewalls. When you start talking about implementing and needing to manage, maintain, configure and report on thousands of firewalls in an environment, however, the issues around centralized management ... should be allowed). Finally, you need to consider what will be necessary to provide for centralized management and reporting on your personal/desktop firewalls. It is one thing to manage a handful ... that is necessary for the applications running on the server, making it much easier to filter traffic with the IDS/IPS (because only the traffic required by the applications running on the server...
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Tài liệu Add and Delete Rows in a Dataset with ADO.NET pdf
... 80. ' Have the command builder create an Insert SQL command 81. modaCustIndiv.InsertCommand = ocbCustIndiv.GetInsertCommand 82. Else 83. ' Have the command builder create an update ... refreshed, and the first customer in the list is displayed in the text boxes. Comments As you can see, adding and deleting a record does not take much more than editing and updating a record using ADO.NET. ... ADO.NET. Using the commands in this How-To and the prior one, you can set it up to handle updating and canceling of multiple records as well. 3. Add the following line of code where you placed the...
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Tài liệu Corporate Governance and Enterprise Reform in China docx
... re-sources in accordance with China’s comparative advantages. Thesechanges would be in addition to the resource reallocation trends thatare already taking place as part of the transition from a plannedeconomy ... Ownershipdiversification has taken two main forms: listing on domestic and in- ternational stock exchanges in the case of larger SOEs, and sales toinsiders, namely, management and employees, in the case of small ... encouraged.Developing an Institutional Investor Base. Institutional investors canplay a catalytic role in activating the use and enhancing the effective-ness of many of the instruments of corporate governance....
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Tài liệu Fuzzy Logic and NeuroFuzzy Applications in Industrial Automation doc
... components.NaphtaSteamBoiler Feed WaterBurnerTemperature SensorFuelHeat ExchangerCracking GasFigure 10: Layout of a steam cracker. Control variables areheating as well as naphtha and steam flowThe ... real variables into linguistic variables.Once all input variable values are translated into respectivelinguistic variable values, the so-called "fuzzy inference" stepevaluates the ... isdifficult as strong disturbances are present. Temperature and feed rate of the incoming cracking gas fluctuate because ofvariations in the steam cracking process step. Another generalproperty...
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Tài liệu Kalman Filtering and Neural Networks - Chapter 1: KALMAN FILTERS doc
... components: a forwardfilter based on the basic Kalman filter, and a combined backward filter and smoother.Applications of Kalman filter theory may be extended to nonlineardynamical systems, as summarized ... xkÞdenotes a nonlinear measurement matrix that may be time-variant, too.The basic idea of the extended Kalman filter is to linearize the state-space model of Eqs. (1.52) and (1.53) at each time instant ... estimation pertaining to the future data, we use backwardfiltering, which starts at the final time N and runs backwards. Let^xxfk and ^xxbkdenote the state estimates obtained from the forward...
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