Dictionary get first key value
dictionary-get-first-key-value.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>() {
{10,"Black Guillemot"},
{20,"Rhinoceros Auklet"},
{30,"Crowned Sandgrouse"},
{40,"Speckled Pigeon"},
{50,"Eurasian Collared Dove"}
};
Label1.Text = "dictionary keys and values..........";
foreach (KeyValuePair<int, string> pair in birds)
{
Label1.Text += "<br />" + pair.Key + " ........ " + pair.Value;
}
//get first keyvaluepair from dictionary.
KeyValuePair<int, string> firstPairOfDictionary = birds.FirstOrDefault();
Label1.Text += "<br /><br />dictionary first key value.........<br />";
Label1.Text += firstPairOfDictionary.Key + " ........ " + firstPairOfDictionary.Value;
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>c# example - dictionary get first key value</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h2 style="color:MidnightBlue; font-style:italic;">
c# example - dictionary get first key value
</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 get first key value"
OnClick="Button1_Click"
Height="40"
Font-Bold="true"
/>
</div>
</form>
</body>
</html>
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