CODEWITHSUNDEEP
javascriptasp.netwebforms
Popplar
Popplar

Reputation: 279

AutoPostBack revert changes that I made with the event onChange. ASP.NET

Theses are the controls that im using in asp.net. Everything is inside an UpdatePanel.

<asp:TextBox ID="TxtDoc" runat="server" MaxLength="4"></asp:TextBox>
<asp:DropDownList ID="TipoDoc" runat="server" AutoPostBack="False"></asp:DropDownList>
<asp:DropDownList ID="Ddl2" runat="server" AutoPostBack="True"></asp:DropDownList>

Codebehind:

TipoDoc.Attributes.Add("onChange", "cambiarLength(this, '" + TxtDoc.ClientID + "');");

When I select an item from the dropdownlist "TipoDoc" the function cambiarLength changes the maxlength of the textbox "TxtDoc". When I select an item from the second dropdownlist "Ddl2" since the autopostback is true, the maxlength from the previous textbox is reverted to the initial value. How can I avoid such a problem like that?

Upvotes: 0

Views: 180

Answers (1)

abramlimpin
abramlimpin

Reputation: 5077

Try this:

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    { 
        TipoDoc.Attributes.Add("onChange", "cambiarLength(this, '" + TxtDoc.ClientID + "');");
    }   
}

Upvotes: 0

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