Textbox,TextChanged event not firing

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Please help me with this, I have 3 textboxes namely txtLastname,txtFirstname and txtUsername I want my txtUsername to automatically be filled after supplying data for txtLastname and txtFirstname the format should be txtLastname_txtFirstname(The first two letters in txtFirstname), here's the code I'm using:

aspx:

XML

<asp:TextBox ID="txtUsername" runat="server" Width="250px"
            ontextchanged="txtUsername_TextChanged" AutoPostBack="true"></asp:TextBox>

cs file:

C#

protected void txtUsername_TextChanged(object sender, EventArgs e)
    {
        txtUsername.Text = txtLastName.Text + "_" + txtFirstName.Text;
    }

Posted 11-Sep-13 2:24am

timJosh

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Thanks7872 · Accepted Answer · 2013-09-11T02:32:00

It should be like follows:

C#

<asp:textbox id="txtFirstname" runat="server" ></asp:textbox>

<asp:textbox id="txtLastname" runat="server" autopostback="true" ontextchanged="txtLastname_TextChanged" ></asp:textbox>

<asp:textbox id="txtUsername" runat="server" width="250px" ></asp:textbox>

C#

protected void txtLastname_TextChanged(object sender, EventArgs e)
{
     txtUsername.Text = txtLastName.Text + "_" + txtFirstName.Text;
}

Regards..:)

CodeBlack · Accepted Answer · 2013-09-11T02:39:00

If you want textbox for username to be changed automatically on changing the value of the txtLastname, txtFirstname than you should create ontextchanged event for txtLastname, txtFirstname instead of txtUsername.

See below code :

ASPX Code :

XML

<asp:TextBox ID="txtLastname" runat="server" Width="250px"
            ontextchanged="txtName_TextChanged" AutoPostBack="true"></asp:TextBox>

    <asp:TextBox ID="txtFirstname" runat="server" Width="250px"
            ontextchanged="txtName_TextChanged" AutoPostBack="true"></asp:TextBox>

    <asp:TextBox ID="txtUsername" runat="server" Width="250px"
            AutoPostBack="true"></asp:TextBox>

CS Code :

C#

protected void txtName_TextChanged(object sender, EventArgs e)
        {
            this.txtUsername.Text = this.txtLastname.Text + "_" + this.txtFirstname.Text;
        }

Leena 206 · Accepted Answer · 2013-09-11T02:40:00

Solution 3

Try this :
put your logic on firstname and lastname textbox text changed.

Posted 11-Sep-13 2:40am

Leena 206

Salman622 · Accepted Answer · 2013-09-11T02:42:00

Solution 4

write the same code for txtfirstName_TextChanged Event then txtUserName will Be filled auto

first u have enter fill data for last name then first name as u remove focus from first name text box then user name text box will fill auto

Posted 11-Sep-13 2:42am

Salman622

Textbox,TextChanged event not firing

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