GridView with ObjectDataSource : ObjectDataSource « ADO.net Database « ASP.Net





GridView with ObjectDataSource


<%@ page language="C#" %>

<%@ import namespace="System" %>
<%@ import namespace="System.Web" %>
<%@ import namespace="System.Collections.Generic" %>

<script runat="server" language="c#">
public class PersonManager {
    private const string personsKey = "persons";

    public PersonCollection SelectPersons() {
        HttpContext context = HttpContext.Current;

        if (context.Application[personsKey] == null) {
            PersonCollection persons = new PersonCollection();

            persons.Add(new Person(0, "A", "B"));
            persons.Add(new Person(1, "C", "D"));
            persons.Add(new Person(2, "E", "F"));
            context.Application[personsKey] = persons;
        }

        return (context.Application[personsKey] as PersonCollection);
    }

    public Person SelectPerson(int id) {
        return this.SelectPersons().FindPersonById(id);
    }

    public void DeletePerson(int Id) {
        HttpContext context = HttpContext.Current;
        PersonCollection persons = (context.Application[personsKey] as PersonCollection);

        persons.Remove(Id);
    }

    public void Update(int Id, string Firstname, string Lastname) {
        HttpContext context = HttpContext.Current;
        PersonCollection persons = (context.Application[personsKey] as PersonCollection);
        Person person = persons.FindPersonById(Id);

        if (person != null) {
            person.Firstname = Firstname;
            person.Lastname = Lastname;
        }
    }
}


public class PersonCollection : List<Person> {

    public void Remove(int id) {
        Person person = this.FindPersonById(id);
        if (person != null) {
            base.Remove(person);
        }
    }

    public Person FindPersonById(int id) {
        foreach (Person person in this) {
            if (person.Id.Equals(id)) {
                return person;
            }
        }
        return null;
    }
}


public class Person {

    private int id;
    private string firstname;
    private string lastname;

    public Person(int id, string firstname, string lastname) {
        this.id = id;
        this.firstname = firstname;
        this.lastname = lastname;
    }

    public int Id {
        get { return this.id; }
        set { this.id = value; }
    }

    public string Firstname {
        get { return this.firstname; }
        set { this.firstname = value; }
    }

    public string Lastname {
        get { return this.lastname; }
        set { this.lastname = value; }
    }
}

</script>

<html>
<head id="Head1" runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="Form1" runat="server">
        <asp:gridview id="GridView1" 
                      runat="server" 
                      datasourceid="ObjectDataSource1" 
                      autogeneratecolumns="False" 
                      datakeynames="Id">
            <alternatingrowstyle backcolor="Red" font-bold="False">
            </alternatingrowstyle>
            <pagerstyle forecolor="Black" 
                        font-italic="False" 
                        font-bold="False" 
                        horizontalalign="Center"
                        backcolor="#999999">
            </pagerstyle>
            <columnfields>
                <asp:boundfield datafield="Id" readonly="True" headertext="ID">
                </asp:boundfield>
                <asp:boundfield datafield="Firstname" headertext="Firstname">
                </asp:boundfield>
                <asp:boundfield datafield="Lastname" headertext="Lastname">
                </asp:boundfield>
                <asp:commandfield showeditbutton="True">
                </asp:commandfield>
                <asp:commandfield showdeletebutton="True">
                </asp:commandfield>
            </columnfields>
            <summarytitlestyle borderwidth="1px" 
                               borderstyle="None" 
                               bordercolor="#999999" 
                               backcolor="White">
            </summarytitlestyle>
            <selectedrowstyle forecolor="White" 
                              backcolor="#008A8C" 
                              font-italic="False" 
                              font-bold="True">
            </selectedrowstyle>
            <detailtitlestyle borderwidth="1px" 
                              borderstyle="None" 
                              bordercolor="#999999" 
                              backcolor="White">
            </detailtitlestyle>
            <rowstyle forecolor="Black" backcolor="#EEEEEE" font-italic="False" font-bold="False">
            </rowstyle>
            <headerstyle forecolor="White" backcolor="#000084" font-italic="False" font-bold="True">
            </headerstyle>
            <footerstyle forecolor="Black" backcolor="#CCCCCC" font-italic="False" font-bold="False">
            </footerstyle>
        </asp:gridview>
        <asp:objectdatasource id="ObjectDataSource1" 
                              runat="server" 
                              typename="PersonManager" 
                              selectmethod="SelectPersons" 
                              updatemethod="Update" 
                              deletemethod="DeletePerson">
        </asp:objectdatasource>

    </form>
</body>
</html>

 










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3.Using Parameters with the ObjectDataSource Control
4.Using Different Parameter Types
5.Passing Objects as Parameters
6.Filtering Data
7.Handling ObjectDataSource Control Events
8.Handling Method Errors
9.Handling the Object Creating Event
10.Concurrency and the ObjectDataSource Control, ConflictDetection: CompareAllValues / OverwriteChanges
11.Creating a Custom ObjectDataSource Control
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13.Creating a Page Property Parameter
14.Define your own collection for ObjectDataSource
15.objectdatasource with control parameter
16.ObjectDataSource with selectmethod, deletemethod, updatemethod, insertmethod
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18.ObjectDataSource and backend database