Skip to main content

c# - How to get value of a specified element of an array

Array get value
The following asp.net c# example code demonstrate us how can we get a specified element value froman array object programmatically at run time in an asp.net application. .Net framework's Array Class Array.GetValue()method get the value of the specified element in the current array.

Array.GetValue(Int32) overloaded method allow us to get the value at the specified position in the one-dimensional array.In this example, we uses this overloaded member. GetValue(Int32) method has a required parameter named 'index' which valuedata type is System.Int32. This parameter value contains a 32-bit integer that represent the position of the array elementto get.

Array.GetValue(Int32) method return a System.Object type value. Method return the element value at the specified positionin the one dimensional array.

So, to get a specified element value of an one-dimensional array by index number, we can call the GetValue(Int32) methodas this way Array.GetValue(ElementIndex). Finally, we get the specified element value.
array-getvalue.aspx

<%@ Page Language="C#" AutoEventWireup="true"%>  

<!DOCTYPE html>  
<script runat="server">  
    protected void Button1_Click(object sender, System.EventArgs e)  
    {
        string[] birds = new string[]
        {
            "Indian Robin",
            "Northern Wheatear",
            "Bluethroat",
            "Spotted Flycatcher",
            "Thrush Nightingale"
        };

        Label1.Text = "birds array.........<br />";
        foreach(string s in birds)
        {
            Label1.Text += s + "<br />";
        }

        string index1bird = birds.GetValue(1).ToString();
        string index3bird = birds.GetValue(3).ToString();

        Label1.Text += "<br />birds array index 1 bird is: " + index1bird;
        Label1.Text += "<br />birds array index 3 bird is: " + index3bird;
    }  
</script>  

<html xmlns="http://www.w3.org/1999/xhtml">  
<head id="Head1" runat="server">  
    <title>c# example - array getvalue</title>  
</head>  
<body>  
    <form id="form1" runat="server">  
    <div>  
        <h2 style="color:DarkBlue; font-style:italic;">  
            c# example - array getvalue
        </h2>  
        <hr width="550" align="left" color="LightBlue" />    
        <asp:Label   
            ID="Label1"   
            runat="server"  
            Font-Size="Large"  
            >  
        </asp:Label>  
        <br /><br />
        <asp:Button   
            ID="Button1"   
            runat="server"   
            Text="array getvalue"  
            OnClick="Button1_Click"
            Height="40"  
            Font-Bold="true"  
            />  
    </div>  
    </form>  
</body>  
</html>

Popular posts from this blog

Restricting Jetpack Compose TextField to Numeric Input Only

Jetpack Compose has revolutionized Android development with its declarative approach, enabling developers to build modern, responsive UIs more efficiently. Among the many components provided by Compose, TextField is a critical building block for user input. However, ensuring that a TextField accepts only numeric input can pose challenges, especially when considering edge cases like empty fields, invalid characters, or localization nuances. In this blog post, we'll explore how to restrict a Jetpack Compose TextField to numeric input only, discussing both basic and advanced implementations. Why Restricting Input Matters Restricting user input to numeric values is a common requirement in apps dealing with forms, payment entries, age verifications, or any data where only numbers are valid. Properly validating input at the UI level enhances user experience, reduces backend validation overhead, and minimizes errors during data processing. Compose provides the flexibility to implement ...

jetpack compose - TextField remove underline

Compose TextField Remove Underline The TextField is the text input widget of android jetpack compose library. TextField is an equivalent widget of the android view system’s EditText widget. TextField is used to enter and modify text. The following jetpack compose tutorial will demonstrate to us how we can remove (actually hide) the underline from a TextField widget in an android application. We have to apply a simple trick to remove (hide) the underline from the TextField. The TextField constructor’s ‘colors’ argument allows us to set or change colors for TextField’s various components such as text color, cursor color, label color, error color, background color, focused and unfocused indicator color, etc. Jetpack developers can pass a TextFieldDefaults.textFieldColors() function with arguments value for the TextField ‘colors’ argument. There are many arguments for this ‘TextFieldDefaults.textFieldColors()’function such as textColor, disabledTextColor, backgroundColor, cursorC...

jetpack compose - Image clickable

Compose Image Clickable The Image widget allows android developers to display an image object to the app user interface using the jetpack compose library. Android app developers can show image objects to the Image widget from various sources such as painter resources, vector resources, bitmap, etc. Image is a very essential component of the jetpack compose library. Android app developers can change many properties of an Image widget by its modifiers such as size, shape, etc. We also can specify the Image object scaling algorithm, content description, etc. But how can we set a click event to an Image widget in a jetpack compose application? There is no built-in property/parameter/argument to set up an onClick event directly to the Image widget. This android application development tutorial will demonstrate to us how we can add a click event to the Image widget and make it clickable. Click event of a widget allow app users to execute a task such as showing a toast message by cli...