typed dataset

field {get;set;} Do not write the display does not come out//foreach (DataRow datarow in DataTable.Rows)// { //Console.WriteLine (datarow["id"]+ "" +datarow[1]); // //encapsulate each row of data into the City class//mycitylist. ADD (new cities () {//Id=int. Parse (datarow["id"). ToString ()),//Cityid=int. Parse (datarow["Cityid"). ToString ()),//city=datarow["City"]. ToString (),//Provinceid = Int. Parse (datarow["Provinceid"). ToString ())// }); // }

Using the version 10.0.1 that comes with ASP.To generate a simple datasetDataSet DS2 =NewDataSet (); DataTable Table=NewDataTable (); Table. Columns.Add (NewDataColumn ("ID") {Caption ="numbering" }); Table. Columns.Add (NewDataColumn ("name") {Caption ="name" }); DataRow Row1=table. NewRow (); row1["ID"] =1; row1["name"] ="Hello"; Table. Rows.Add (ROW1); Ds2. Tables.add (table); stringSDDTR =Jsonconvert.serializeobject (DS2); varDD = jsonconvert.deserializeobjec

"FONT-SIZE:18PX;" >public class Datatableconvertjson { Convert #region DataTable into JSON format // // DataTable converted to JSON format // /// // public static string Datatable2json (DataTable dt) { StringBuilder Jsonbuilder = new StringBuilder (); Jsonbuilder.append ("{\" "); Jsonbuilder.append (dt. TableName); Jsonbuilder.append ("\": ["); Jsonbuilder.append ("["); For (int i = 0; i { Jsonbuilder.append ("{"); For (int j = 0; j { J

　　　　 /// ///DataTable converted to JSON format/// /// /// Public Static stringToJson (DataTable dt) {StringBuilder Jsonbuilder=NewStringBuilder (); Jsonbuilder.append ("{\""); Jsonbuilder.append (dt. Tablename.tostring ()); Jsonbuilder.append ("\":["); for(inti =0; i ) {jsonbuilder.append ("{"); for(intj =0; J ) {jsonbuilder.append ("\""); Jsonbuilder.append (dt. COLUMNS[J]. ColumnName); Jsonbuilder.append (

Although Ado.net is a successor to the. NET platform, the difference between the two is great. DataSet objects in the Recordset objects and ado.net that are highlighted in ADO. The recordset is also a very flexible object, Microsoft launched it also painstaking, such as: The Recordset can be offline operation of the database tutorial, good performance, high efficiency, etc. these all let the then programmer spirits. Although the recordset is already c

Dataset is a method used to connect to SQL. It means to store copies of the database in applications.ProgramWhen the application starts running, save the database-related data to dataset.Datatable indicates a table with data in memory. You can use view to obtain a custom view of a table that may include a filtering view or a cursor position.The datareader object is the simplest way to read the database. It can only read, cannot write, and is read from

and Repeater canDatalist1.datasource =Pds; Datalist1.databind ();}1. Create a DataSet object:DataSet ds = new DataSet ("DatasetName");2. View the structure created by calling Sqldataadapter.fillDa. Fill (ds, "Orders");DataTable tbl = ds. TABLE[0];foreach (DataColumn col in tbl. Columns)Console.WriteLine (Col. ColumnName);3. View the data returned by SqlDataAdapter①, DataRow objectDataTable tbl = ds. TABLE[

Dataset indicates a dataset, which is cached in memory. Can contain multiple tablesDatset is non-connection-oriented when connecting to the database. Read all tables to the SQL Buffer Pool and disconnect from the database. Datareader is connected to the database. When reading a table, you can only read the table forward. After reading the data, the user decides whether to disconnect the table. The data in t

This article introduces the detailed description of dataset in javascript, including the basic usage of dataset, the role of dataset, and basic operations of dataset, if you are interested in javascriptdataset, let's learn it. DataSet is ADO. NET.

Tags: Report set computing report script Dataset A new dataset type, script dataset, is provided for computing reports. This allows you to further compute and process data in a dataset to provide data source support for reports. The following describes the script dataset.What is a script

Disadvantages of weak Dataset: Whenever the retrieved value from dataset is returned as an object, type conversion is required; When used by other developers, they cannot know which columns are available; You can only know the names of all columns at runtime, so it is difficult to bind data. Therefore, vs provides us with the automatic generation function of a strongly

Create a strong dataset as the data source of irdview. a column in the dview is the datagridviewcheckboxcolumn deletion column. After selecting the dataset, click the delete button. To compare the dataset, you must reload the data source and load the strong dataset. However, all the selected data items in the datagridv

I. Use sqldataadapter. Update (Dataset DS) to update the database.1. When dbdataadapter calls the update method, dataadapter analyzes the changes and runs the corresponding commands (insert, update, or delete ). When dataadapter encounters a change to datarow, it uses insertcommand, updatecommand, or deletecommand to handle the change. In this way, you can try to improve the ADO. NET application by specifying the command syntax at design and using sto

public static DataSet Exceltods (String pathm,string tablename) ...　　　　　　{ DataSet ds = new DataSet (); Try ... { String strconn = "Provider=Microsoft.Jet.OLEDB.4.0 +" + "Data source=" + Path + ";" + "Extended Properties=ex　　　　　　　　CEL 8.0; "; OleDbConnection conn = new OleDbConnection (strconn); Conn.　　　　　　　　Open (); String strexcel = ""; OleDbDataAdapter mycomma