Insert an object at the top of the Stack
The Stack class represents a simple last-in-first-out non-generic collection of objects. The Stack capacity is the number of elements it can hold. When elements are added to a Stack, its capacity is automatically increased as required through reallocation. The Stack accepts null as a valid value and allows duplicate elements.
The following .net c# tutorial code demonstrates how we insert an object at the top of the Stack. In this .net c# tutorial code, we used the Stack class Push() method to insert an object at the top of a Stack.
The Stack class Push(Object) method inserts an object at the top of the Stack. The Stack class Push(object? obj) method has a parameter named obj. The obj parameter is the Object to push onto the Stack. The value can be null.
StackPushMethod.aspx
<%@ Page Language="C#" AutoEventWireup="true" %>
<!DOCTYPE html>
<script runat="server">
protected void Button1_Click(object sender, System.EventArgs e)
{
Stack colors = new Stack();
colors.Push("Blue");
colors.Push("DodgerBlue");
colors.Push("SkyBlue");
colors.Push("LightBlue");
colors.Push("DeepSkyBlue");
Label1.Text = "Stack Elements... ";
Label1.Text += "<font color=DarkOrchid>";
foreach (string color in colors)
{
Label1.Text += "<br />" + color;
}
Label1.Text += "</font>";
colors.Push("MidnightBlue");
Label1.Text += "<br /><br />After inserting an object at the top of the Stack";
Label1.Text += "<br />using Push(object) method. Now Stack Elements...<br />";
Label1.Text += "<font color=DarkOrchid>";
foreach (string color in colors)
{
Label1.Text += "<br />" + color;
}
Label1.Text += "</font>";
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>Stack Push() Method - How to insert an object at the top of the Stack</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h2 style="color:MidnightBlue; font-style:italic;">
System.Collections.Stack Push() Method
<br /> How to insert an object at the top of the Stack
</h2>
<hr width="475" align="left" color="Navy" />
<br />
<asp:Label
ID="Label1"
runat="server"
ForeColor="DarkOliveGreen"
Font-Size="Large"
Font-Names="Courier New"
Font-Italic="true"
Font-Bold="true"
>
</asp:Label>
<br /><br />
<asp:Button
ID="Button1"
runat="server"
OnClick="Button1_Click"
Text="Test Stack Push() Method"
Height="45"
Font-Bold="true"
ForeColor="DodgerBlue"
/>
</div>
</form>
</body>
</html>
