RowState attribute in DataTable, datatablerowstate
This attribute is an enumerative type of a read-only attribute. It has five values: Detached, Unchanged, Added, Deleteed, Modified,
// First state: the value of Detached is 1: The row has been created, but it is not part of any System. Data. DataRowCollection. System. Data. DataRow is in this status immediately after being created, before being added to the collection, or after being removed from the
1. datatable Introduction
(1) constructorDatatable () initializes a new instance of the datatable class without parameters.Datatable (string tablename) uses the specified table name to initialize a new instance of the datatable class.Datatable (string tablename, string tablenamespace) uses the specified table name and namespace to initialize a new instance of the
Datatable usage Induction
I. Create a memory table and the following code will use itDatatable auto = new datatable ();Auto. Columns. Add ("ID ");Auto. Columns. Add ("name ");For (INT I = 1; I {Auto. Rows. Add (new object [] {I, "baibaoqing "});}II. The following describes the common usage of datatable objects.1. Copy and clone datatableC
Directly run the code to retrieve the rows with the age column greater than 13.Using (sqlconnection conn = new sqlconnection ("Data Source =.; initial catalog = test; Integrated Security = true "))
{
Dataset DS = new dataset ();
String selecttext = "select * From tab_cj ";
Sqldataadapter SDA = new sqldataadapter (selecttext, Conn );
SDA. Fill (DS );
Datatable olddt = Ds. Tables [0];
Datatable newdt = olddt
1. DataTableDataTable indicates a table of data in the memory. It exists independently in the memory and contains all the information of this table. DataTable can be a table read from the database through a connection. Once the data is read to the DataTable, The DataTable can be detached from the data source; it can also be a table created entirely by the program
A DataTable with the same structure as the user request data structure is built, then the user's request is populated into the built DataTable and the DataTable is added to the dataset.Datatable,,datacolumn,datarow in-depth researchA DataTable is a relational data table in memory that can be created independently or us
1. DataTable Introduction
(1) constructor
DataTable () initializes a new instance of the DataTable class without parameters.
DataTable (string tableName) uses the specified table name to initialize a new instance of the DataTable class.
In the following example, 3 Join methods are implemented to connect two DataTable, equivalent to the SQL inner join method, and return all columns of the DataTable.
If the DataColumn in the two DataTable is duplicated, the second is set to Columnname+ "_second", and the following code is in the hope of helping.
Using System;
Using System.Data;
Namespace WindowsA
When the system data volume is very large, the front-end paging, asynchronous access is a better solution. All along, I want to use the jquery plugin I developed to do the system.Now, after learning the jquery plug-in development, and gradually also try to develop some simple plug-ins, has developed the accordion, tab, today and you introduce this DataTable page table plug-in.We will first explain the use, and then analyze the implementation of plug-i
Author: Romantic 11 WolfIn the following example, 3 Join methods are implemented to connect two DataTable, equivalent to the SQL inner join method, and return all columns of the DataTable.If the DataColumn in the two DataTable is duplicated, the second is set to Columnname+ "_second", and the following code is in the hope of helping.Using System;Using System.Data;
Namespace WindowsApplication1{public class
One: official website: [http://www.datatables.net/]Two: basic use: [Http://www.guoxk.com/node/jquery-datatables]1, the default configuration of DataTables
$ (document). Ready (function () {$ (' #example '). dataTable ();} );
Example: http://www.guoxk.com/html/DataTables/Zero-configuration.html2. Some basic property configuration of DataTables
"Bpaginate": true,//page turn function"Blengthchange": true,//change the number of data
Tags: C #, ADO8. DataTable Create data tableA DataTable represents a table of in-memory relational data that can be created and used independently or by other. NET Framework objects to use,The most common scenario is used as a member of a dataset.DataTable objects can be created by using the DataTable constructor, or you can pass constructor arguments to a datase
DataTable dt = ""; Here is the DataTable data that fills the datatable dtnew = dt. Copy (); Copy DT table data structure dtnew.clear ( ) DT. Rows.Count; i++) { if (conditional statement) { dtNew.Rows.Add (dt. Rows[i]. ItemArray); Add data row } }= = = Premise: We already have a
1. DataTable Introduction(1) constructorDataTable () initializes a new instance of the DataTable class without parameters.DataTable (string tableName) uses the specified table name to initialize a new instance of the DataTable class.DataTable (string tableName, string tableNamespace) uses the specified table name and namespace to initialize a new instance of the
(1) constructorDatatable () initializes a new instance of the datatable class without parameters.Datatable (string tablename) uses the specified table name to initialize a new instance of the datatable class.Datatable (string tablename, string tablenamespace) uses the specified table name and namespace to initialize a new instance of the datatable class.(2) commo
This article is a total of four parts: official website | basic Usage | problems encountered | property sheet
One: official website: [http://www.datatables.net/]
Two: basic use: [Http://www.guoxk.com/node/jquery-datatables]
1, the default configuration of DataTables
$ (document). Ready (function () {$ (' #example '). dataTable ();} );
Example: http://www.guoxk.com/html/DataTables/Zero-configuration.html
2. Some basic property configuration of DataTabl
1. dataview indicates the datatable. The records in the able table have no sequence, but the display can be in different order (dataview ),
But it is still the same table, so a datatable can have multiple dataviews. By default, the datatable is accessed.
Defaultview. Dataset is a set of datatable, and there can be mo
1"Add a DataTable DataSet.Tables.Add (DataTable) instance to the DataSet: DataSet DS=NewDataSet (); DataTable Table=NewDataTable ("Student Table"); Ds. Tables.add (table);2"Reading a DataTable DataTable from a DataSet=dataset.tables[0] or dataset.tables["Table name"] Example
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