Dictionary ContainsValue() Method
.Net framework Dictionary represents a collection of keys and values. Dictionary class exists under System.Collections.Generic namespace.
Dictionary<TKey, TValue> ContainsValue() method allow us to determine whether the dictionary contains a specific value. this ContainsValue() method require to pass a parameter named 'value'. this 'value' parameter value type is 'TValue' which represents the value to locate in the Dictionary<TKey, TValue> and the value can be null for reference types.
this method return value data type is System.Boolean. the ContainsValue() method return 'true', if the Dictionary<TKey, TValue> contains an element with the specified value. otherwise, this method return 'false'.
the following asp.net c# example code demonstrate us how can we check whether dictionary contains an element with the specified value programmatically at run time in an asp.net application.
Dictionary<TKey, TValue> ContainsValue() method allow us to determine whether the dictionary contains a specific value. this ContainsValue() method require to pass a parameter named 'value'. this 'value' parameter value type is 'TValue' which represents the value to locate in the Dictionary<TKey, TValue> and the value can be null for reference types.
this method return value data type is System.Boolean. the ContainsValue() method return 'true', if the Dictionary<TKey, TValue> contains an element with the specified value. otherwise, this method return 'false'.
the following asp.net c# example code demonstrate us how can we check whether dictionary contains an element with the specified value programmatically at run time in an asp.net application.
DictionaryContainsValueMethod.aspx
<%@ Page Language="C#" AutoEventWireup="true" %>
<%@ Import Namespace="System.Collections.Generic" %>
<!DOCTYPE html>
<script runat="server">
protected void Button1_Click(object sender, System.EventArgs e)
{
Dictionary<string, string> colors = new Dictionary<string, string>();
colors.Add("#F0E68C", "Khaki");
colors.Add("#7CFC00", "LawnGreen");
colors.Add("#000080", "Navy");
colors.Add("#4B0082", "Indigo");
Label1.Text = "Dictionary Keys...<br />";
foreach (string color in colors.Values)
{
Label1.Text += color + "<br />";
}
//ContainsValue() method check whether the Dictionary contains a specific value.
Label1.Text += "<br />'Indigo' Value Exists In Dictionary? " + colors.ContainsValue("Indigo");
Label1.Text += "<br />'Orange' Value Exists In Dictionary? " + colors.ContainsValue("Orange");
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>Dictionary ContainsValue() Method - How to check whether Dictionary contains a specific value</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h2 style="color:Navy; font-style:italic;">
System.Collections.Generic.Dictionary ContainsValue() Method
<br /> How to check whether Dictionary contains a specific value
</h2>
<hr width="550" align="left" color="Navy" />
<br />
<asp:Label
ID="Label1"
runat="server"
ForeColor="Indigo"
Font-Names="Courier New"
Font-Size="Large"
>
</asp:Label>
<br /><br />
<asp:Button
ID="Button1"
runat="server"
OnClick="Button1_Click"
Text="Test Dictionary ContainsValue() Method"
Height="45"
Font-Bold="true"
ForeColor="DodgerBlue"
/>
</div>
</form>
</body>
</html>

- How to add an item to a Dictionary
- How to remove all items from a Dictionary
- How to check whether Dictionary contains a specific key
- How to remove items from a Dictionary while iterating
- How to remove items from a Dictionary in loop
- How to remove items from a Dictionary by condition
- How to remove an item from Dictionary by value
- How to convert Dictionary values to list
- How to convert Dictionary keys to list
- How to access Dictionary items by index