Concatenate integers and string in C#

Here, we will see how to concatenate integers and string in C#. To do that we take two TextBox for integers and one TextBox for string and one TextBox for concatenate both integers and string.

Aspx code

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="add.aspx.cs" Inherits="addtextbox.add" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

</head>

<body>

<div>

First:

<asp:TextBox ID="txt1" runat="server"></asp:TextBox>

<br />

Second:<asp:TextBox ID="txt2" runat="server"></asp:TextBox>

<br />

Third<asp:TextBox ID="txt3" runat="server"></asp:TextBox>

<br />

<asp:Button ID="Button1" runat="server" onclick="Button1_Click"

style="margin-bottom: 0px" Text="Button" />

<br />

Fourth:<asp:TextBox ID="txt4" runat="server"></asp:TextBox>

</div>

</form>

</body>

</html>

The form looks like below figure1.

Figure1

Now double click on the Button control and add the following code.

protected void Button1_Click(object sender, EventArgs e)

{

int a =Convert.ToInt32(txt1.Text) ;

int b= Convert.ToInt32(txt2.Text);

string c = txt3.Text;

txt4.Text = a.ToString() + b.ToString() + c;

}

Now run the application and test it.

Figure2

Now click on the Button to Concatenate integers and string.

Figure3