JavaScript 无法与 RadTextBox 一起使用

Question

 <telerik:RadCodeBlock ID="RadCodeBlock1" runat="server">
        <script type="text/javascript">

            function ValidatePhoneNumbers() {

                var phone = document.getElementById('txtPhone1');
                var mobile =document.getElementById('txtPhone2');
                alert(phone.value);
                if ((phone.value == null || phone.value == "") && (mobile.value == null || mobile.value == "")) {
                    alert('something');
                    return false;
                }
                else {
                    alert('something');
                    return true;
                }
           }

        </script>

<tr>
                                        <td>
                                         <label for="txtPhone1">
                                                Phone :</label>
                                        </td>
                                        <td>

                                            <telerik:RadNumericTextBox ID="txtPhone1" runat="server" Text='<%# Bind("Phone_One") %>' Type="Number" Skin="Windows7" CssClass="txt">
                                                     <numberformat allowrounding="false" keepnotroundedvalue="False" GroupSeparator=""></numberformat>
                                            </telerik:RadNumericTextBox>
                                            <asp:CustomValidator ID="rqfldPhone1" runat="server" ControlToValidate="txtPhone1"
                                                Display="Dynamic" ErrorMessage="*" ValidationGroup="Submit" ToolTip="Enter Phone Number"  ></asp:CustomValidator>
                                        </td>

 <telerik:RadButton ID="btnUpdate" runat="server" Text='<%# (Container is GridEditFormInsertItem) ? "Insert" : "Update" %>'
                                    CommandName='<%# (Container is GridEditFormInsertItem) ? "PerformInsert" : "Update" %>'
                                    Skin="Windows7" ValidationGroup="Submit">

当我将“OnClientClicked”添加到RadButton以在javaScript中调用javaScript(“return ValidatePhoneNumbers”)时，它显示NULL为什么？有 2 个 rad 文本框 txtphone1 和 txtphone2 ，实际上我想验证这些文本框，如果填充了任何一个则没有问题，否则我需要显示错误/警告消息。请帮助我

Actually ".value" is not shownig in javascript (document.GetelementById.value)

Answer 1

当您使用 telerik 控件时，用于查找控件和执行操作的 javascript 与我们使用普通 html 和 javascript 时不同:

查找 radcombox:

$find("<%=RadComboBox1.ClientID %>");//for example

让我们来解决您的问题:

var phone=$find("<%=txtPhone1.ClientID %>");
var mobile=$find("<%=txtPhone2.ClientID %>");
alert(phone.get_value());//use get_value() to get the value of radcombobox
if ((phone.get_value() == null || phone.get_value() == "") && (mobile.get_value() == null ||  mobile.get_value()== "")) {
        alert('something');
        eventArgs.set_cancel(true);
    }
    else {
        alert('something');
    }
}