Generate random alphanumeric string into password field

问题

I want to generate a random alphanumeric string into password field when click a button.

<asp:TextBox ID="txtPassword" runat="server" TextMode="Password"></asp:TextBox>

code behind the button

var chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
var stringChars = new char[8];
var random = new Random();

            for (int i = 0; i < stringChars.Length; i++)
            {
                stringChars[i] = chars[random.Next(chars.Length)];
            }

var finalString = new String(stringChars);

txtPassword.Text = finalString.ToString();

this execute without any error.. but does not appear any text in textbox. When I use

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

This works properly..

I have no any idea why my code is not working..

Please help me to solve this problem...

回答1:

If you want to add text to password mode textfield then you need to write.

txtPassword.Attributes.Add("value", finalString.ToString());

回答2:

Suggest to add using attributes

txtPassword.Attributes.Add("value", finalString.ToString());

please refer below link for more information on this.

http://www.tyronedavisjr.com/2008/05/23/aspnet-and-password-textbox-with-initial-value/

来源：https://stackoverflow.com/questions/17874086/generate-random-alphanumeric-string-into-password-field