[ASP.NET] - Créer des controls web ou Html dynamiquement

05.09.2007

Default.aspx :

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<%@ Register Src="MyWebUserControl.ascx" TagName="MyWebUserControl" TagPrefix="uc1" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<title>Page sans titre</title>

</head>

<body>

<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>

</form>

</body>

</html>

1 – Controls web

protected void Page_Load(object sender, EventArgs e)

{

// 1 - System.Web.UI.WebControls

ListBox listBox = new ListBox();

listBox.Items.Add("item 1");

listBox.Items.Add("item 2");

// j'applique un evenement

listBox.AutoPostBack = true;

listBox.SelectedIndexChanged += new EventHandler(listBox_SelectedIndexChanged);

form1.Controls.Add(listBox);

Button button = new Button();

button.Text = "OK";

button.Click += new EventHandler(button_Click);

form1.Controls.Add(button);

}

void button_Click(object sender, EventArgs e)

{

Label1.Text = "click on button";

}

void listBox_SelectedIndexChanged(object sender, EventArgs e)

{

Label1.Text = (sender as ListBox).SelectedValue;

}

2 –controls HTML

protected void Page_Load(object sender, EventArgs e)

{

// 2 - System.Web.UI.HtmlControls

HtmlTable table = new HtmlTable();

HtmlTableRow row = new HtmlTableRow();

HtmlTableCell cell1 = new HtmlTableCell();

cell1.Controls.Add(listBox);

HtmlTableCell cell2 = new HtmlTableCell();

cell2.Controls.Add(button);

row.Cells.Add(cell1);

row.Cells.Add(cell2);

table.Rows.Add(row);

form1.Controls.Add(table);

}

3 – Charger un control utilisateur web dynamiquement

J’ai un control utilisateur web MyWebUserControl que je vais ajouter dynamiquement à la page

protected void Page_Load(object sender, EventArgs e)

{

Control myWebUserControl1 = this.LoadControl("MyWebUserControl.ascx");

form1.Controls.Add(myWebUserControl1);

}