$（'＃'+ CommentBoxId）.val（）; 没有接受

Question

User enters data in comment box and clicks corresponding submit btn. Im trying to pass id, CompanyId, WorkId, CommentBoxId to code behind to update the record. So far this all works fine, but I also want to pass the data entered in the commentbox.

JavaScript runtime error: Sys.Net.WebServiceFailedException: The server method 'CommentBox' failed with the following error: System.InvalidOperationException-- Invalid web service call, missing value for parameter: 'CommentBoxContents'.

The values of id, CompanyId, WorkId and CommentBoxId, are all passed correctly. so how can i pass what is entered in the text box? thank you

---

EDIT:

<script type="text/javascript" language="javascript">
   var commentBoxData
   function SubmitButton(id, CompanyId, WorkId, CommentBoxId) 
   {
       var commentBoxData = $('#'+CommentBoxId).val();
        Functions.CommentBox(id, CompanyId, WorkId, commentBoxData);
   }
</script>

//Inside a repeater:

<th style="width:200px;">
     <input id="Comments" name='<%# GetIdOfCommentBox((int)Eval("id")) %>' 
             type="text" runat="server" value='<%# Bind("Comment") %>' />
    <input id="SubmitComments" type="button"
           onclick="SubmitButton('<%# Eval("id") %>','<%# Eval("CompanyId") %>',
                        '<%# Eval("WorkId") %>','<%# Eval("CommentId") %>');"  />
</th>

Answer 1

You are using $(CommentBoxId).val() which is wrong.

     function SubmitButton(id, CompanyId, WorkId, CommentBoxId) 
     {
         $('#'+CommentBoxId).val();

        Functions.CommentBox(id, CompanyId, WorkId,  $('#'+CommentBoxId).val(), Test);  
     }

please use $('#'+CommentBoxId).val() in the Functions.CommentBox

Answer 2

You could try re-writing your code like this:

function SubmitButton(id, CompanyId, WorkId, CommentBoxId) 
{
   var commentBoxId = $('#'+ CommentBoxId).val();
   Functions.CommentBox(id, CompanyId, WorkId,  commentBoxId, Test);  
}

** UPDATE **

And inside the repeater, the textbox id should be the same as the SubmitButton 's CommentBoxId parameter:

<th style="width:200px;">
     <input id="CommentId" name='<%# GetIdOfCommentBox((int)Eval("id")) %>' 
             type="text" runat="server" value='<%# Bind("Comment") %>' />
    <input id="SubmitComments" type="button"
           onclick="SubmitButton('<%# Eval("id") %>','<%# Eval("CompanyId") %>',
                        '<%# Eval("WorkId") %>','<%# Eval("CommentId") %>');"  />
</th>

Answer 3

This line does nothing effective because you are not storing the result of the val() call

$('#'+CommentBoxId).val();

The call to Functions.CommentBox will have a null value for the fourth parameter because you are not prefixing the id with the hash.

Try this:

var commentBoxIdVal = $('#'+CommentBoxId).val();
Functions.CommentBox(id, CompanyId, WorkId, commentBoxIdVal, Test);  

Answer 4

看起来您的输入的ID为“评论”，但您尝试在通话中使用“CommentId”。