Difference between revisions of "Repeater"

From no name for this wiki
Jump to: navigation, search
(New page: Leider fehlt dieses Beispiel über einen Repeater in vielen ASP.NET Büchern. Benutzt man das ItemBound Event, macht es den Code viel lesbarer. <source lang="asp"> <%@ Page Language="C#" ...)
 
(→‎Sample2)
 
(3 intermediate revisions by the same user not shown)
Line 1: Line 1:
 +
== Sample1 ==
 
Leider fehlt dieses Beispiel über einen Repeater in vielen ASP.NET Büchern. Benutzt man das ItemBound Event, macht es den Code viel lesbarer.
 
Leider fehlt dieses Beispiel über einen Repeater in vielen ASP.NET Büchern. Benutzt man das ItemBound Event, macht es den Code viel lesbarer.
  
Line 25: Line 26:
  
 
</source>
 
</source>
 +
 +
 +
  
 
<source lang="csharp">
 
<source lang="csharp">
Line 61: Line 65:
 
             label.Text = item;
 
             label.Text = item;
 
         }
 
         }
 +
    }
 +
}
 +
</source>
 +
== Sample2 ==
 +
<source lang="asp">
 +
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
 +
 +
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 +
 +
<html xmlns="http://www.w3.org/1999/xhtml">
 +
<head runat="server">
 +
    <title>Fruit Quantities</title>
 +
</head>
 +
<body>
 +
    <form id="form1" runat="server">
 +
    <div>
 +
        <asp:Repeater ID="Repeater1" runat="server" OnItemDataBound="ItemBound">
 +
            <ItemTemplate>
 +
                <asp:Label ID="Label1" runat="server" Text='<%# Eval("Key")%>'/>             
 +
                <asp:DropDownList ID="DropDownList1" runat="server">
 +
                  <asp:ListItem Text="0" Value="0"/>
 +
                  <asp:ListItem Text="1" Value="1"/>
 +
                  <asp:ListItem Text="2" Value="2"/>
 +
                </asp:DropDownList>
 +
                <br />
 +
            </ItemTemplate>
 +
        </asp:Repeater>
 +
        <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Submit" />
 +
    </div>
 +
    </form>
 +
</body>
 +
</html>
 +
 +
</source>
 +
 +
<source lang="csharp">
 +
using System;
 +
using System.Collections;
 +
using System.Collections.Generic;
 +
using System.Configuration;
 +
using System.Data;
 +
using System.Linq;
 +
using System.Web;
 +
using System.Web.Security;
 +
using System.Web.UI;
 +
using System.Web.UI.HtmlControls;
 +
using System.Web.UI.WebControls;
 +
using System.Web.UI.WebControls.WebParts;
 +
using System.Xml.Linq;
 +
 +
public partial class _Default : System.Web.UI.Page
 +
{
 +
 +
    protected void Page_Load(object sender, EventArgs e)
 +
    {
 +
        if (IsPostBack == false)
 +
        {
 +
            IDictionary<string, ushort> data = this.FruitQuantities();
 +
            this.Repeater1.DataSource = data;
 +
            this.Repeater1.DataBind();
 +
        }
 +
    }
 +
 +
    private IDictionary<string, ushort> FruitQuantities()
 +
    {
 +
        Dictionary<string, ushort> result = new Dictionary<string, ushort>();
 +
        result.Add("Bananas", 0);
 +
        result.Add("Apples", 1);
 +
        result.Add("Pears", 1);
 +
        return result;
 +
    }
 +
 +
    public void ItemBound(Object sender, RepeaterItemEventArgs e)
 +
    {
 +
        if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
 +
        {
 +
            KeyValuePair<string, ushort> item = (KeyValuePair<string, ushort>)e.Item.DataItem;
 +
            DropDownList dropDownList = (DropDownList)e.Item.FindControl("dropDownList1");
 +
            dropDownList.SelectedValue = item.Value.ToString();
 +
        }
 +
    }
 +
 +
 +
    protected void Button1_Click(object sender, EventArgs e)
 +
    {     
 +
        foreach(RepeaterItem item in this.Repeater1.Items)
 +
        {         
 +
            DropDownList dropDownList = (DropDownList)item.FindControl("dropDownList1");
 +
            ushort quantity = ushort.Parse(dropDownList.SelectedValue);
 +
            Console.WriteLine("Quantity: {0}", quantity);
 +
        }
 +
    }
 +
}
 +
</source>
 +
 +
== Sample 3 ==
 +
Bei jedem Item hat es zwei Buttons. Im Code wird evaluiert, velcher Button gedrückt worden ist.
 +
<source lang="asp">
 +
<%@ Page Language="C#"
 +
        AutoEventWireup="true"
 +
        CodeBehind="WebForm1.aspx.cs"
 +
        Inherits="WebApplication2.WebForm1"%>
 +
 +
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 +
 +
<html xmlns="http://www.w3.org/1999/xhtml">
 +
<head runat="server">
 +
    <title></title>
 +
</head>
 +
<body>
 +
    <form id="form1" runat="server">
 +
    <div>
 +
        <asp:Repeater ID="Repeater1" runat="server" OnItemDataBound="ItemBound" OnItemCommand="ItemCommand">
 +
            <ItemTemplate>
 +
                <asp:Button ID="ButtonEdit" runat="server" />
 +
                <asp:Button ID="ButtonDelete" runat="server" />
 +
                <br />
 +
            </ItemTemplate>
 +
        </asp:Repeater>
 +
    </div>
 +
    <asp:Label ID="LabelFeedback" runat="server" Text="Nothing clicked yet"></asp:Label>
 +
    </form>
 +
</body>
 +
</html>
 +
 +
</source>
 +
 +
Das Code-Behind:
 +
 +
<source lang="csharp">
 +
using System;
 +
using System.Collections.Generic;
 +
using System.Linq;
 +
using System.Web;
 +
using System.Web.UI;
 +
using System.Web.UI.WebControls;
 +
 +
namespace WebApplication2
 +
{
 +
    public partial class WebForm1 : System.Web.UI.Page
 +
    {
 +
        protected void Page_Load(object sender, EventArgs e)
 +
        {
 +
            if (!IsPostBack)
 +
            {
 +
                IList<int> list = new List<int>();
 +
                list.Add(1);
 +
                list.Add(2);
 +
                list.Add(3);
 +
                list.Add(4);
 +
                list.Add(5);
 +
                this.Repeater1.DataSource = list;
 +
                this.Repeater1.DataBind();
 +
            }
 +
 +
        }
 +
 +
        public void ItemBound(Object sender, RepeaterItemEventArgs e)
 +
        {
 +
            if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
 +
            {
 +
                int dataitem = (int) e.Item.DataItem;
 +
 +
                Button buttonEdit = (Button) e.Item.FindControl("ButtonEdit");
 +
                buttonEdit.CommandName = "Edit";
 +
                buttonEdit.CommandArgument = "" + dataitem;
 +
                buttonEdit.Text = "Edit " + dataitem;       
 +
 +
                Button buttonDelete = (Button)e.Item.FindControl("ButtonDelete");
 +
                buttonDelete.CommandName = "Delete";
 +
                buttonDelete.CommandArgument = "" + dataitem;
 +
                buttonDelete.Text = "Delete " + dataitem;             
 +
            }
 +
        }
 +
 +
        public void ItemCommand(Object Sender, RepeaterCommandEventArgs e)
 +
        {
 +
            this.LabelFeedback.Text = string.Format("commandname: {0}, commandarg:  {1}", e.CommandName, e.CommandArgument);           
 +
        }   
 +
 +
   
 
     }
 
     }
 
}
 
}
 
</source>
 
</source>

Latest revision as of 14:05, 22 July 2010

Sample1

Leider fehlt dieses Beispiel über einen Repeater in vielen ASP.NET Büchern. Benutzt man das ItemBound Event, macht es den Code viel lesbarer. 

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default3.aspx.cs" Inherits="Default3" %>

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

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:Repeater ID="Repeater1" runat="server" OnItemDataBound="ItemBound">
            <ItemTemplate>
                <h2>hello <asp:Label ID="LabelItem" runat="server" Text="Label"/></h2>
            </ItemTemplate>                            
        </asp:Repeater>
    </div>
    </form>
</body>
</html>




using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

public partial class Default3 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        IList<String>  myList = new List<String>();
        myList.Add("hugo");
        myList.Add("bossi");
        myList.Add("aikobus");

        this.Repeater1.DataSource = myList;
        this.Repeater1.DataBind();
    }

    public void ItemBound(Object sender, RepeaterItemEventArgs e)
    {
        if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
        {
            string item = (string) e.Item.DataItem;
            Label label = (Label) e.Item.FindControl("LabelItem");
            label.Text = item;
        }
    }
}

Sample2

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

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

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Fruit Quantities</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:Repeater ID="Repeater1" runat="server" OnItemDataBound="ItemBound">
            <ItemTemplate>
                <asp:Label ID="Label1" runat="server" Text='<%# Eval("Key")%>'/>               
                <asp:DropDownList ID="DropDownList1" runat="server">
                   <asp:ListItem Text="0" Value="0"/>
                   <asp:ListItem Text="1" Value="1"/>
                   <asp:ListItem Text="2" Value="2"/>
                </asp:DropDownList>
                <br />
            </ItemTemplate>
        </asp:Repeater>
        <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Submit" />
    </div>
    </form>
</body>
</html>

using System;
using System.Collections;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

public partial class _Default : System.Web.UI.Page
{

    protected void Page_Load(object sender, EventArgs e)
    {
        if (IsPostBack == false)
        {
            IDictionary<string, ushort> data = this.FruitQuantities();
            this.Repeater1.DataSource = data;
            this.Repeater1.DataBind();
        }
    }

    private IDictionary<string, ushort> FruitQuantities()
    {
        Dictionary<string, ushort> result = new Dictionary<string, ushort>();
        result.Add("Bananas", 0);
        result.Add("Apples", 1);
        result.Add("Pears", 1);
        return result;
    }

    public void ItemBound(Object sender, RepeaterItemEventArgs e)
    {
        if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
        {
            KeyValuePair<string, ushort> item = (KeyValuePair<string, ushort>)e.Item.DataItem;
            DropDownList dropDownList = (DropDownList)e.Item.FindControl("dropDownList1");
            dropDownList.SelectedValue = item.Value.ToString();
        }
    }


    protected void Button1_Click(object sender, EventArgs e)
    {       
        foreach(RepeaterItem item in this.Repeater1.Items)
        {          
            DropDownList dropDownList = (DropDownList)item.FindControl("dropDownList1");
            ushort quantity = ushort.Parse(dropDownList.SelectedValue);
            Console.WriteLine("Quantity: {0}", quantity);
        }
    }
}

Sample 3

Bei jedem Item hat es zwei Buttons. Im Code wird evaluiert, velcher Button gedrückt worden ist. 

<%@ Page Language="C#" 
         AutoEventWireup="true" 
         CodeBehind="WebForm1.aspx.cs" 
         Inherits="WebApplication2.WebForm1"%>

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

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:Repeater ID="Repeater1" runat="server" OnItemDataBound="ItemBound" OnItemCommand="ItemCommand">
            <ItemTemplate>
                <asp:Button ID="ButtonEdit" runat="server" />
                <asp:Button ID="ButtonDelete" runat="server" />
                <br />
            </ItemTemplate>
        </asp:Repeater>
    </div>
    <asp:Label ID="LabelFeedback" runat="server" Text="Nothing clicked yet"></asp:Label>
    </form>
</body>
</html>

Das Code-Behind: 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace WebApplication2
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                IList<int> list = new List<int>();
                list.Add(1);
                list.Add(2);
                list.Add(3);
                list.Add(4);
                list.Add(5);
                this.Repeater1.DataSource = list;
                this.Repeater1.DataBind();
            }

        }

        public void ItemBound(Object sender, RepeaterItemEventArgs e)
        {
            if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
            {
                int dataitem = (int) e.Item.DataItem;

                Button buttonEdit = (Button) e.Item.FindControl("ButtonEdit");
                buttonEdit.CommandName = "Edit";
                buttonEdit.CommandArgument = "" + dataitem;
                buttonEdit.Text = "Edit " + dataitem;         

                Button buttonDelete = (Button)e.Item.FindControl("ButtonDelete");
                buttonDelete.CommandName = "Delete";
                buttonDelete.CommandArgument = "" + dataitem;
                buttonDelete.Text = "Delete " + dataitem;              
            }
        }

        public void ItemCommand(Object Sender, RepeaterCommandEventArgs e)
        {
            this.LabelFeedback.Text = string.Format("commandname: {0}, commandarg:   {1}", e.CommandName, e.CommandArgument);            
        }    

    
    }
}
Retrieved from "http://www.claude-glauser.ch/mediawiki/index.php?title=Repeater&oldid=1661"