c# - 上一个按钮显示验证

Question

这是我的表单中具有自定义验证的文本框的示例，我想禁用验证器:

 <asp:textbox id="txtFirstName" runat="server" /></td><td>
        <script language ="javascript">
            function requireFirstName(source, args) {

                if (document.getElementById("<%=txtFirstName.ClientID %>").value =="") {
                    args.IsValid = false;
                }
                else {
                    args.IsValid = true;
                }
            }
      </script>
        <asp:CustomValidator ID="RequiredValidator1" runat="server" 
            ErrorMessage="You must enter your first name." 
             ForeColor="Red" clientvalidationfunction="requireFirstName"
            ></asp:CustomValidator>

这是我以前的按钮:

<asp:Button ID="PreviousButton" runat="server"  
                Text="<-- Back to Instructions" OnClick="btnBack_Click" 
                class="previous"   />
            <script type="javascript">
             document.getElementById("<%=PreviousButton.ClientID%>").disableValidation = true;
            </script>

这不会起作用，但仍然有验证器..help

Answer 1

尝试设置CausesValidation为假。

<asp:Button ID="PreviousButton" runat="server" Text="<-- Back to Instructions" OnClick="btnBack_Click" class="previous" CausesValidation="false" />