ASP.NET Generate Random Password Using VB.NET

Here, we will see how to generate random password in ASP.NET.
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Here, we will see how to generate random password in ASP.NET. Drag and drop two TextBox and one Control on the form. One TextBox to give the length of the TextBox other to displays random password according to length when we click on the Button control.

The form looks like below figure.

random1.gif
 

Figure1

.ASPX code

<body>

    <form id="form1" runat="server">

    <div>

        Password Length:

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

        <br />

        <br />

        Random Password:

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

        <br />

        <br />

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

            Text="Generate Password" />

        <br />

   

    </div>

    </form>

</body>

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

VB code

Protected Sub Button1_Click(ByVal sender As ObjectByVal e As EventArgsHandles Button1.Click

        Dim allowedChars As String = ""

        allowedChars = "a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z,"

        allowedChars += "A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z,"

        allowedChars += "1,2,3,4,5,6,7,8,9,0,!,@,#,$,%,&,?"

        Dim sep As Char() = {","c}

        Dim arr As String() = allowedChars.Split(sep)

        Dim passwordString As String = ""

        Dim temp As String = ""

        Dim rand As New Random()

        For i As Integer = 0 To Convert.ToInt32(txtPassLength.Text) - 1

            temp = arr(rand.[Next](0, arr.Length))

            passwordString += temp

        Next

        txtpassword.Text = passwordString

    End Sub

C# code

protected void Button1_Click(object sender, EventArgs e)

        {

            string allowedChars = "";

            allowedChars = "a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z,";

            allowedChars += "A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z,";

            allowedChars += "1,2,3,4,5,6,7,8,9,0,!,@,#,$,%,&,?";

            char[] sep = { ',' };

            string[] arr = allowedChars.Split(sep);

            string passwordString = "";

            string temp = "";

            Random rand = new Random();

            for (int i = 0; i < Convert.ToInt32(txtPassLength.Text); i++)

            {

                temp = arr[rand.Next(0, arr.Length)];

                passwordString += temp;

            }

            txtpassword.Text = passwordString;

        }

 

Now run the application.

random2.gif
 

Figure2

Now give the length of the password.

random3.gif
 

Figure3

Now click on the Button to generate random password.

random4.gif
 

Figure4

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