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Simple data binding of a commonly used control for Winform development-code binding of DataSet, able, IList, SqlDataReader, and datagridviewilist The previous section describes the automatic data binding feature provided by Winform for the DataGridView. The following section describes how to bind data using code. 1. Use DataSet and DataTable to provide data sources for the DataGridView Code first Private void Form1_Load (object sender, EventArgs e) {S

Use AutoMapper to map IDataReader, DataSet, and able to object class, And automapperdatatable AutoMapper is A. NET object ing tool. Project address: https://github.com/automapper/automapper. Help document: https://github.com/AutoMapper/AutoMapper/wiki Main Purpose The conversion between the domain object and DTO, and the database query result are mapped to the object. The following describes how to convert IDataReader, DataSet, and

DataSet contains multiple able and constraints between DataTable.If you do not need to map the relationship between your data, it is more efficient to directly use DataTable. If a relational query such as 1: N or N: M is required, fill in all the corresponding datatables in DataSet, and then use the relational query data.The DataSet data source can be viewed as a database, and the DataTable is a table in the database.Add a

Since the advent of smart handsets led by Apple Apple, almost every handset leader has raced to launch a variety of smart phones that are powerful and most durable. and mobile phone function and a variety of powerful app also constantly introduce the innovation, so that the smart phone is not just mobile phones, and gradually become a universal machine can reach everything. In order to understand what the public believes is the essential function of smart phones, pollster Online network in 2/10

In actual programming projects, we often encounter the following situation: datatable is not in the database, or datatable has not been written to the database, or the able read from the database has been changed locally, I have not written it back to the database (other changes may be required). In these cases, I only need to use it. the powerful functions of the dataview class provided by the net class library (mainly using its rowfilter attribute)

) { Console. writeline (item. tostring ()); } Console. readkey (); } /// /// Create a able and add data for testing. /// /// Public static datatable createdt () { Datatable dt = new datatable (); DT. Columns. Add (New datacolumn ("ID", typeof (system. int32 ))); DT. Columns. Add (New datacolumn ("name", typeof (system. String ))); DT. Columns. Add (New datacolumn ("Address", typeof (system. String ))); DT. Rows. Add (1, "Dylan

For the purpose of the project, you often need to know the tables in which a value has appeared, and then analyze the execution process and processing logic of the program. We usually use the SQL event tracker. This tool is rarely used, but it is often overwhelmed by the large number of events tracked during use. As a result, I made a given value, which can query any field in any table with the same value, specify the corresponding table and field, such as an SQL full database retrieval tool.

In actual programming projects, we often encounter the following situation: datatable is not in the database, or datatable has not been written to the database, or the able read from the database has been changed locally, I have not written it back to the database (other changes may be required). In these cases, I only need to use it. the powerful functions of the dataview class provided by the net class library (mainly using its rowfilter attribute)

The European Union said on Tuesday that about middle May of European Windows users will be able to choose to install browsers other than IE by 0.1 billion. AccordingThe agreement between Microsoft and the European Union, Microsoft agreed to bind ie browsers in windows, while also providing installation options for other browsers. These browsers are arranged in random order. Since this month, Microsoft has provided Installation Options for other browse

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. Clone (); Foreach (datarow olddr in olddt. Rows){If (Int. parse (olddr ["Age"]. tostrin

The Ethernet Control Chip dm9000 is able to receive data correctly on 2440 bare metal (the source code project has been uploaded) (411.47 K) the attachment was downloaded 168 times After a few days of dm9000, I have never been able to correctly receive data. I am so depressed for a few days. Now I am happy. I have referred to this Article "single-chip microcomputer-driven dm9000 Nic chip (detailed debu

The European Union said on Tuesday that about middle May of European Windows users will be able to choose to install browsers other than IE by 0.1 billion. According to the agreement reached between Microsoft and the European Union, Microsoft agreed to bind ie browsers in Windows and provide installation options for other browsers. These browsers are arranged randomly. Since this month, Microsoft has provided Installation Options for other browsers t

Generic constraints: Copy codeThe Code is as follows: public static class ToModel Define delegation:Copy codeThe Code is as follows: public delegate void SetString (string value ); Delegate creation method:Copy codeThe Code is as follows: private static SetString CreateStringDelegate (T model, string propertyName){MethodInfo mi = model. GetType (). GetProperty (propertyName). GetSetMethod ();Type type = typeof (SetString );Return Delegate. CreateDelegate (type, model, mi) as SetString;} Use refl

If you use the MFC socket Class Csoket communication, you must use a stream socket and not be able to use the sock_dgram type socket. The reasons are as follows:The difference between a 1 stream socket and a datagram socket is thatThe former is reliably transmitted, and data is split into multiple packets sent:(1) Send and receive packets on both ends of the packet in the same order.(2) The packet cannot be duplicated.(3) Each packet has no bounds.The

Now, there are some new changes in the WINDOWS10 Pro system, and if we upgrade the system to WINDOWS10 professional build 1511 (that is, Win10 TH2), you won't be able to close the Win10 App Store in the future, even if it's changed by Group Policy.After 365bet system city For more information, this policy is only suitable for WIN10 professional system, and in WIN10 Enterprise Edition and Education edition, WIN10 Store can be turned off is a reservatio

After learning the Python language to learn PHP JavaScript, these programming languages are better able to understand quickly, After having the Python foundation, it is easier to learn the PHP language comprehension. I would like to study the two aspects of PHP JavaScript, my friend suggested that after I learned Python, and then to learn PHP will be easier to understand these programming languages The great God give me a little advice, it is necessa

If Yu Yu such a problem:The description is: "The last time you have the Sogou input method installed or uninstalled, the operation requires a restart." You will not be able to continue with the new input method after restarting the load program "Win+rInput: regeditFollow the path below to find "Sogouinput"Hkey_local_machine\software\wow6432node\sogouinput\Delete "Sogouinput" in the RegistryRe-install it!The last time you have the Sogou input method in

VM Virtual machine can not be the Internet problem solved in front of the words: Many netizens read my article, the virtual machine or can not surf the internet, contact me to help, the results to help them to fix it, all said blame himself too careless, did not carefully read the article. I am not afraid of netizens trouble me, I sincerely hope that you must first carefully read the article, step by step according to the article operation, general Self can solve the problem. Indeed, please c

In webform development, it is inevitable that the data in grilview will be converted to a able. The following classes will implement this function, but only the data displayed will be processed separately. Using system;Using system. Collections. Generic;Using system. text;Using system. Web. UI. webcontrols;Using system. Data;Using system. Web. UI; Public class gridviewhelper{// Generate a able from the d

In actual programming projects, we often encounter the following situation: datatable is not in the database, or datatable has not been written to the database, or the able read from the database has been changed locally, I have not written it back to the database (other changes may be required). In these cases, I only need to use it. the powerful functions of the dataview class provided by the net class library (mainly using its rowfilter attribute)