c# - Unable to get value of the property 'click': object is null or undefined - Stack Overflow

admin管理员组

文章数量:1414628

So I want a Button1 to be clicked when the submit button has been clicked.

Here is the relevant code:

<input id="Submit1" type="submit" value="Search" onclick="javascript:check_user()" /> 
<script type="text/javascript">
            function check_user() {
                document.getElementById('<%=Button1.ClientID%>').click();
            }  
</script>
<asp:Button id="Button1" runat="server" Visible="false" OnClick="Button1_Click"/>

And here is the error I get:

Microsoft JScript runtime error: Unable to get value of the property 'click': object is null or undefined

Does anyone have any ideas as to what the problem might be? I've been tearing my hair out trying to work it out.

So I want a Button1 to be clicked when the submit button has been clicked.

Here is the relevant code:

<input id="Submit1" type="submit" value="Search" onclick="javascript:check_user()" /> 
<script type="text/javascript">
            function check_user() {
                document.getElementById('<%=Button1.ClientID%>').click();
            }  
</script>
<asp:Button id="Button1" runat="server" Visible="false" OnClick="Button1_Click"/>

And here is the error I get:

Microsoft JScript runtime error: Unable to get value of the property 'click': object is null or undefined

Does anyone have any ideas as to what the problem might be? I've been tearing my hair out trying to work it out.

• c#
• javascript
• asp
• onclick

Share Improve this question Follow asked Mar 27, 2012 at 22:46 QuestionableSounderQuestionableSounder 9111 gold badge44 silver badges1313 bronze badges 2

• Why do you need to click two buttons on the client-side? Why not just run the relevant code on the server-side? Is the form posting to a 3rd-party location and you're trying to execute some code on your server as well? – mellamokb Commented Mar 27, 2012 at 22:52
• If you can tell me a way to have input's onclick go to a c# method then I would be grateful (it can never seem to find the method when I try) - otherwise this was the only way I could think to do it. – QuestionableSounder Commented Mar 27, 2012 at 22:58

Add a ment  | 

3 Answers 3

Sorted by: Reset to default 1

Can't you just do it with a single button?

<asp:Button id="Button1" runat="server" Text="Search" OnClick="Button1_Click"/>

Server-side code:

protected void Button1_Click(object sender, EventArgs e) {
    // processing code here
}

if you are not limited to java-script you can try using the trigger from jquery like this

 <script type="text/javascript">
            function check_user() {
           $("#<%=Button1.ClientID%>").trigger('click');
         //or

 $("#<%=Button1.ClientID%>").click();

            }  
</script>

As you made the button invisible, asp is not rendering the button control in html. (You can check the HTML source). You can create a style and apply it to the asp button once it is rendered at client side to make it invisible.

.MyHiddenButtonStyle{display:none;}// add this in the header in styles

<input id="Submit1" type="button" name="search" value="Search" onclick="javascript:check_user()" />
<asp:Button id="Button1" runat="server" CssClass="MyHiddenButtonStyle" OnClick="Button1_Click"/>

function check_user() {
        document.getElementById('<%=Button1.ClientID%>').click();
    }

One more thing I have made the submit button as normal button. anyways you are raising a postback event using javascript.

本文标签： cUnable to get value of the property 39click39 object is null or undefinedStack Overflow