Retain password value in the asp.net TextBox after postback event

Introduction:

While working with Password type textboxes i.e. Textbox with TextMode =”Password”, when postback occurs, the value for these textboxes will be lost. We need to enter password again, which is not user friendly.

In this article i am going to explain with example How to maintain the password value in the TextBox controls during/on/while/even after the occurrence of postback event in asp.net using both C# and VB.Net languages.

Source Code:

   <fieldset style="width:280px";>

    <legend><strong>Maintain password after postback</strong></legend>

    <table>

    <tr><td>UserName</td><td>

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

        </td></tr>

    <tr><td>Password</td><td>

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

        </td></tr>

        <tr><td>Confirm Password</td><td>

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

        </td></tr>       

        <tr><td>Country</td><td>

            <asp:DropDownList ID="ddlCountry" runat="server" AutoPostBack="True">

                <asp:ListItem>India</asp:ListItem>

                <asp:ListItem>USA</asp:ListItem>

                <asp:ListItem></asp:ListItem>

            </asp:DropDownList>

        </td></tr>       

    <tr><td></td><td>

        <asp:Button ID="btnSubmit" runat="server" Text="Submit"

            onclick="btnSubmit_Click" /></td></tr>

    </table>

    </fieldset>

 C#.Net code to keep the password in Postback

write the code as :

protected void Page_Load(object sender, EventArgs e)

    {

        if (IsPostBack)

      {

            if (!(String.IsNullOrEmpty(txtPwd.Text.Trim())))

            {

                 txtPwd.Attributes["value"]= txtPwd.Text;              

            }

            if (!(String.IsNullOrEmpty(txtConfirmPwd.Text.Trim())))

            {

                txtConfirmPwd.Attributes["value"] = txtConfirmPwd.Text;

            }

      }

    }

    protected void btnSubmit_Click(object sender, EventArgs e)

    {

     // Write your code here;      

    }

 Vb.Net Code  retain  the password in textbox  after Postback

In the code behind file(.aspx.vb) write the code as:

  Protected Sub Page_Load(sender As Object, e As System.EventArgs) Handles Me.Load

        If IsPostBack Then

            If Not ([String].IsNullOrEmpty(txtPwd.Text.Trim())) Then

                txtPwd.Attributes("value") = txtPwd.Text

            End If

            If Not ([String].IsNullOrEmpty(txtConfirmPwd.Text.Trim())) Then

                txtConfirmPwd.Attributes("value") = txtConfirmPwd.Text

            End If

        End If

    End Sub

    Protected Sub btnSubmit_Click(sender As Object, e As System.EventArgs) Handles btnSubmit.Click

     // Write your code here      

    End Sub