Dictionary remove while iterating
dictionary-remove-while-iterating.aspx
<%@ Page Language="C#" AutoEventWireup="true"%>
<!DOCTYPE html>
<script runat="server">
protected void Button1_Click(object sender, System.EventArgs e)
{
//initialize a dictionary with keys and values.
Dictionary<int, string> birds = new Dictionary<int, string>() {
{1,"Squirrel Cuckoo"},
{2,"Giant Coua"},
{3,"Pheasant Cuckoo"},
{4,"Guira Cuckoo"},
{5,"Asian Koel"}
};
Label1.Text = "dictionary keys and values..........";
foreach (KeyValuePair<int , string> pair in birds)
{
Label1.Text += "<br />" + pair.Key + " ........ " + pair.Value;
}
//create an int array with dictionary keys.
int[] keys = birds.Keys.ToArray();
Label1.Text += "<br /><br />removing keys from dictionary which key lower than 3 <br />";
foreach (int key in keys)
{
if(key<3)
{
//remove element from dictionary.
birds.Remove(key);
Label1.Text += "key ["+ key + "] removed from dictionary<br />";
}
}
Label1.Text += "<br />dictionary keys and values after removing elements..........";
foreach (KeyValuePair<int, string> pair in birds)
{
Label1.Text += "<br />" + pair.Key + " ........ " + pair.Value;
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>c# example - dictionary remove while iterating</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h2 style="color:MidnightBlue; font-style:italic;">
c# example - dictionary remove while iterating
</h2>
<hr width="550" align="left" color="Gainsboro" />
<asp:Label
ID="Label1"
runat="server"
Font-Size="Large"
>
</asp:Label>
<br /><br />
<asp:Button
ID="Button1"
runat="server"
Text="dictionary remove while iterating"
OnClick="Button1_Click"
Height="40"
Font-Bold="true"
/>
</div>
</form>
</body>
</html>
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