A brief discussion on the DataSource property in C# data binding controls

Sometimes, when you enter a certain stage of programming and it is very difficult to further improve, you might as well go back and look at the basic things. Maybe you will gain new benefits, and maybe you can truly understand what Confucius said. The true meaning of “reviewing the past and learning the new”.
Commonly used C# data binding controls include: Repeater, DataList, GridView, DetailsView, etc. Here I use Repeater to briefly explain the problem.
Use this property to specify the data source used to fill the Repeater control. DataSource can be any System.Collections.IEnumerable object,
such as System.Data.DataView, System.Collections.ArrayList, System.Collections.Hashtable, array or IListSource object used to access the database.
Commonly used data sources:
A DataTable
A DataView
A DataSet
Any component that implements the IListSource interface
Any component that implements the IList interface
Note:
If To bind to a strongly-typed array of objects, the object type must contain public properties.
The specific applications of DataSource are introduced below through several simple examples.
<1>Binding a DataTable generally involves retrieving data from the database and then binding it directly. The specific database operation logic is no longer provided. Everyone must be very familiar with it. Binding a DataView is similar to this.
Program code

privatevoidBindData()    
{    
//通过业务逻辑，直接调用数据库中的数据    
DataTablenTable=getTable();    
  
Repeater1.DataSource=nTable;    
Repeater1.DataBind();    
}

HTML code
C#Data binding control program code

<asp:RepeaterIDasp:RepeaterID="Repeater1"runat="server">   
<HeaderTemplate>   
<table>   
<tr>   
<thscopethscope="col">   
姓名th>   
<th>   
年龄th>   
<tr>   
<HeaderTemplate>   
<ItemTemplate>   
<tr>   
<td>   
<%#Eval("Key")%>   
<td>   
<td>   
<%#Eval("value")%>   
<td>   
<tr>   
<ItemTemplate>   
<FooterTemplate>   
<table><FooterTemplate>   
<asp:Repeater>

<2>Bind Array, ArrayList, List, one-dimensional array, etc., inside Store simple data.
ArrayList
C#Data binding control program code

privatevoidBindData()    
{    
ArrayListlist=newArrayList();    
list.Add("Jim");    
list.Add("Tom");    
list.Add("Bluce");    
list.Add("Mary");    
  
Repeater1.DataSource=list;    
Repeater1.DataBind();    
}

HTML appropriate changes
Program code

<asp:RepeaterIDasp:RepeaterID="Repeater1"runat="server">   
<HeaderTemplate><table><tr><thscopethscope="col">姓名<th><tr><HeaderTemplate>   
<ItemTemplate><tr><td><%#Container.DataItem%><td><tr><ItemTemplate>   
<FooterTemplate><table><FooterTemplate>   
<asp:Repeater>

<3>Bind Dictionary, HashTable
Dictionary
C#Data binding control program code

privatevoidBindData()    
{    
Dictionary<string,int>dic=newDictionary<string,int>();    
dic.Add("Jim",21);    
dic.Add("Tom",26);    
dic.Add("Bluce",33);    
dic.Add("Mary",18);    
  
Repeater1.DataSource=dic;    
Repeater1.DataBind();    
}

HTML code
Program code

<asp:RepeaterIDasp:RepeaterID="Repeater1"runat="server">   
<HeaderTemplate><table><tr><thscopethscope="col">姓名<th><th>年龄<th><tr><HeaderTemplate>   
<ItemTemplate><tr><td><%#Eval("Key")%>td><td><%#Eval("value")%><td><tr><ItemTemplate>   
<FooterTemplate><table><FooterTemplate>   
<asp:Repeater>

<4>Bind object collection, IList, etc. This is very useful. When we perform data query, we often retrieve data from the database. In order to facilitate operation, it needs to be encapsulated into objects. However, sometimes these objects need to be displayed in the form of a list. One solution: object conversion For DataTable, the other is to call the database directly. These two options are not ideal. And here, the object collection is directly bound to the data display control, pointing out a way out for me. In fact, in PetShop4.0, this is used to bind ICollection or IList. easy to understand.
A simple user class containing two public properties.
Program code

usingSystem;  
usingSystem.Data;  

///

///SummarydescriptionforUser  
///

publicclassUser  
{  
privatestring_Name;  
publicstringName  
{  
get{return_Name;}  
set{_Name=value;}  
}  
privateint_Age;  
publicintAge  
{  
get{return_Age;}  
set{_Age=value;}  
}  
publicUser()  
{  
//  
//TODO:Addconstructorlogichere  
//  
}  
publicUser(stringname,intage)  
{  
_Name=name;  
_Age=age;  
}  
}

Binding object collection:
IList
Program code

privatevoidBindData()    
{    
Useruser1=newUser("Jim",21);    
Useruser2=newUser("Tom",23);    
Useruser3=newUser("Bluce",33);    
Useruser4=newUser("Mary",18);    
  
IList<User>list=newList<User>();    
list.Add(user1);    
list.Add(user2);    
list.Add(user3);    
list.Add(user4);    
  
Repeater1.DataSource=list;    
Repeater1.DataBind();    
}

The public properties of the corresponding Repeater binding object:
C#Data binding Control program code

<asp:RepeaterIDasp:RepeaterID="Repeater1"runat="server"> 
<HeaderTemplate> 
<table> 
<tr> 
<thscopethscope="col"> 
姓名th> 
<th> 
年龄<th> 
<tr> 
<HeaderTemplate> 
<ItemTemplate> 
<tr> 
<td> 
<%#Eval("Name")%> 
<td> 
<td> 
<%#Eval("Age")%> 
<td> 
<tr> 
<ItemTemplate> 
<FooterTemplate> 
<table><FooterTemplate> 
<asp:Repeater>

The above is the content of the DataSource property in the C# data binding control. For more related content, please pay attention to the PHP Chinese website (www.php.cn)!