asp.net/javascript,为什么textbox onChange事件不会触发?

时间:2013-09-23 18:17:50

标签: javascript html asp.net

我希望在用户选择userID然后在第一个只读文本框中显示userID后发生onChange事件在第一个只读文本框中显示时触发,以便它可以将此userID复制到第二个文本框。但是它不起作用,只有用户ID出现在第一个文本框上,但onChange不会触发第二个texbox。

这里有半个工作代码:

<tr>
    <td align="right">
        Secondary Owner
    </td>
    <td>
        <input id="Hidden1" type="hidden" />
        <asp:TextBox ID="tbAdd_Sowner" runat="server" Enabled="false"></asp:TextBox>
        <input id="Hidden2" type="hidden" />
        <input id="Hidden3" type="hidden" />
        <a href="javascript:void(0)" onclick="GalModalTOCCDialog(Hidden1, tbAdd_Sowner, Hidden2,Hidden3)">
            Get User ID</a>
        <asp:RequiredFieldValidator ID="RequiredFieldValidator7" ValidationGroup="g1" runat="server" ErrorMessage="* Required" ControlToValidate="tbAdd_Sowner"> <b style="color:Red;"> * </b></asp:RequiredFieldValidator>
        <asp:ValidatorCalloutExtender ID="ValidatorCalloutExtender8" runat="server" TargetControlID="RequiredFieldValidator7">
        </asp:ValidatorCalloutExtender>
    </td>
</tr>
<tr>
    <td align="right">Secondary Owners</td>
    <td>
        <asp:TextBox ID="tbAdd_Sphone" runat="server"></asp:TextBox>
        <asp:RequiredFieldValidator ID="RequiredFieldValidator13" ValidationGroup="g1" runat="server" ErrorMessage="* Required" ControlToValidate="tbAdd_Sphone"> <b style="color:Red;"> * </b></asp:RequiredFieldValidator>
        <asp:ValidatorCalloutExtender ID="ValidatorCalloutExtender9" runat="server" TargetControlID="RequiredFieldValidator13">
        </asp:ValidatorCalloutExtender>
    </td>
</tr>

然后<head>中的javascript代码复制第一个文本框值并放入第二个文本框:

 <script>
        function getUserID() {
            document.getElementById('tbAdd_Sphone').value = document.getElementById('tbAdd_Sowner').value;
        }

document.getElementById('tbAdd_Sowner').onchange = getUserID();

            </script>

已编辑:我在此处添加了GALModalDialog.js代码,因为有些人想要查看它的内容。我还有GALToCCDialong.asp列出了要选择的userid和从ADs获取用户ID的XMLGALListbox.asp。

function PopulateListboxFromString(oListbox,vNames,vUserIDs){

    var oArrayUserNames = vNames.value.split(';');
    var oArrayUserIDs = vUserIDs.value.split(';');

    for (var index=0;index < oArrayUserIDs.length;index++) {

        if (oArrayUserNames[index] != ''){
            var oOption = document.createElement("OPTION");
            oListbox.options.add(oOption);
            oOption.innerText = oArrayUserNames[index];
            oOption.value = oArrayUserIDs[index];
        }
    }   
};

function GalModalTOCCDialog(oTONames, oTOUserIDs,oCCNames, oCCUserIDs ) {


        if (oCCNames != null){

            var oInputArray = new Array(oTONames.value,oTOUserIDs.value,oCCNames.value,oCCUserIDs.value);

        } else {

            var oInputArray = new Array(oTONames.value,oTOUserIDs.value,'','');

        }

        var oOutputArray = window.showModalDialog('GalAccess/GALToCCDialog.asp', oInputArray, 'dialogWidth:510px;dialogHeight:400px;status:no;help:no;');





        // Check if we get something back; 
        // User might have closed the window without using the buttons
        if (oOutputArray != null){

            //first element is true if user clicked OK

            if (oOutputArray[0]) {

                if (oCCNames != null){

                    oTONames.value = oOutputArray[1];
                    oTOUserIDs.value = oOutputArray[2];
                    oCCNames.value = oOutputArray[3];
                    oCCUserIDs.value = oOutputArray[4];

                } else {

                    oTONames.value = oOutputArray[1];
                    oTOUserIDs.value = oOutputArray[2];     
                }



            } 
        }

    return false;
}

function GalModalDialog(oSelectObject, oUserID) {

    if (oUserID == null){
        // there is a select object to fill data from
        // fill the input array
        var oInputArray = new Array(new Array(oSelectObject.options.length),new Array(oSelectObject.options.length));

        for (var index=0;index < oInputArray[0].length;index++) {
            oInputArray[0][index] = oSelectObject.options[index].innerText;
            oInputArray[1][index] = oSelectObject.options[index].value;

        };

        var oOutputArray = window.showModalDialog('../GALDialog/GALModalDialog.asp', oInputArray, 'dialogWidth:500px;dialogHeight:320px;status:no;help:no;');

        // Check if we get something back; 
        // User might have closed the window without using the buttons
        if (oOutputArray != null){

            //first element is true if user clicked OK

            if (oOutputArray[0]) {
                //remove existing from end to beginning otherwise not all options are removed.

                var length=oSelectObject.options.length;
                for (var index=length-1;index >= 0;index--) {
                    oSelectObject.options[index] = null;
                };

                // copy the array   
                for (var index=0;index < oOutputArray[1].length;index++) {
                    var oOption = document.createElement("OPTION");
                    oSelectObject.options.add(oOption);
                    oOption.innerText = oOutputArray[1][index];
                    oOption.value = oOutputArray[2][index];

                };
            } 
        }
    } else
    {
        // there are 2 text objects to fill data from; the first contains the name, the secound the userid.
        //if (oSelectObject.value != '' ) {
        //  var oInputArray = new Array(new Array(1),new Array(1));
        //
        //  oInputArray[0][0] = oSelectObject.value;
        //  oInputArray[1][0] = oUserID.value;

        //} else {

                var oInputArray = new Array(new Array(0),new Array(0));

        //}     
        var oOutputArray = window.showModalDialog('../GALDialog/GALModalDialog.asp', oInputArray, 'dialogWidth:500px;dialogHeight:320px;status:no;help:no;');

        if (oOutputArray != null){

            //first element is true if user clicked OK

            if (oOutputArray[0]) {

                // copy the data    
                oSelectObject.value = oOutputArray[1][0];
                oUserID.value = oOutputArray[2][0];


            } 
        }
    }
    return false;
}

已编辑:以下是GALToCCDialog.asp的代码。在SubmitOnclick函数和else if(vAction == 'OK')中,我从所选用户ID中单击“确定”按钮以提交到文本框。

<SCRIPT ID=clientEventHandlersJS LANGUAGE=javascript>
<!--

function List_onkeydown(oList) {

    if( event.keyCode == 46 ){

        if ((oList.selectedIndex != -1)&&(oList.options[oList.selectedIndex].value != '')){
            oList.options[oList.selectedIndex] = null;

        }
    }
}

//-->
</SCRIPT>


<script language="jscript">



function InitializeListbox(idXML, idSpan){

    // get to the XML specifying the names
    var oSelects;
    var strXML;

    oSelects  = idXML.XMLDocument.documentElement.childNodes;
    strXML = '';
    // Get all the options in 1 string
    for (var index=0;index< oSelects.length;index++){
        strXML = strXML + oSelects[index].xml;
    }
    // the error handlingis there if idSpan refers to multiple objects

    // Insert the options in the html before the end of the SELECT
    // window.alert(strXML);
    //idSpan.innerHTML = replace(idSpan.innerHTML,"</SELECT>",strXML & "</SELECT>");
    idSpan.innerHTML = '<SELECT id=idUserSelect size=12 style="width:190px">' + strXML + '</SELECT>';
}

function SubmitOnclick(vAction, oObject){

    //DistList.action = "DistList.asp?Action=" & vAction ;

    if (vAction == 'Add'){

        if ((idUserSelect.value!='')&&(idUserSelect.value!='Unknown')){
            var oOption = document.createElement("OPTION");
            oObject.options.add(oOption);
            oOption.innerText = idUserSelect.options[idUserSelect.selectedIndex].text;
            oOption.value = idUserSelect.options[idUserSelect.selectedIndex].value;
        }
    }   else if(vAction == 'Find') {
        idXMLUsers.src ='XMLGALListbox.asp?Searchstring=' + SearchString.value;

    } else if(vAction == 'Remove'){

        if ((idMyList.selectedIndex != -1)&&(idMyList.options[idMyList.selectedIndex].value != '')){
            idMyList.options[idMyList.selectedIndex] = null;
        }
    } else if(vAction == 'OK'){

        //window.returnValue = cal.day + ' ' + MonthNames[cal.month-1] + ' ' + cal.year ;
        // create an array

        var TONames = ''
        var TOUserIDs = ''
        var CCNames = ''
        var CCUserIDs = ''

        for (var index = 0; index < 1; index++) {
            TONames = TONames + idTOList.options[index].innerText;
            TOUserIDs = TOUserIDs + idTOList.options[index].value;
        };

        //Commented out by Nick, use if you want multiple userIDs etc...
        //for (var index=0;index < idTOList.options.length;index++) {
        //  TONames = TONames + idTOList.options[index].innerText  ;
        //  TOUserIDs = TOUserIDs + idTOList.options[index].value ;         
        //};

        //for (var index=0;index < idCCList.options.length;index++) {
            //CCNames = CCNames + idCCList.options[index].innerText ;
            //CCUserIDs = CCUserIDs + idCCList.options[index].value ;

        //};

        var oArray = new Array(true,TONames,TOUserIDs,CCNames,CCUserIDs);

        window.returnValue = oArray;

        //window.alert(TONames);
        //window.alert(TOUserIDs);
        //window.alert(CCNames);
        //window.alert(CCUserIDs);

        window.close();

    } else if(vAction == 'Cancel'){
        var oArray = new Array(false);
        window.returnValue = oArray;
        window.close();

    }   

}

function OnBodyLoad() {

    //window.alert('test');
    //clear all list data

    try{
        var oArray = window.dialogArguments;

        //PopulateListboxFromString(idTOList,oArray[0],oArray[1])
        //PopulateListboxFromString(idCCList,oArray[2],oArray[3])

    } catch(e)
    {
    }

};

function PopulateListboxFromString(oListbox,vNames,vUserIDs){

    var oArrayUserNames = vNames.split(';');
    var oArrayUserIDs = vUserIDs.split(';');
    for (var index=0;index < oArrayUserIDs.length;index++) {

        if (oArrayUserNames[index] != ''){
            var oOption = document.createElement("OPTION");
            oListbox.options.add(oOption);
            oOption.innerText = oArrayUserNames[index];
            oOption.value = oArrayUserIDs[index];
        }
    }   

};

function OnBodyLoad__() {

    //window.alert('test');
    try{
        var oArray = window.dialogArguments;

        for (var index=0;index < oArray[0].length;index++) {
            var oOption = document.createElement("OPTION");
            idMyList.options.add(oOption);
            oOption.innerText = oArray[0][index];
            oOption.value = oArray[1][index];

        };
    } catch(e)
    {

    };
};

</script>
<body class="cellcolorlightest content" onload="OnBodyLoad();">
<xml id="idXMLUsers" src="XMLGALListbox.asp?Searchstring=" ondatasetcomplete="InitializeListbox(idXMLUsers, idUsers);"></xml>

    <table class="TableBorderNormal" width="100%" border=0 cellspacing="1" cellpadding="1">
    <colgroup>
        <col width="50%"></col><col></col><col width="50%"></col>
        <thead>

        <tr>
         <td colspan="3" class="TDvwvInfo" align="left"><STRONG>Find Name</STRONG><br><FONT size=2>Type name and hit "Search"</FONT></td>
        </tr>

        <tr>
         <td  class="TDvwvInfo" align="left"><input name="SearchString" style="WIDTH: 190px" size="20"> &nbsp;</td>
         <td class="TDvwvInfo" align="middle" valign=top><input  type="button" value="Search" name="Find" onclick="SubmitOnclick('Find')"></td>
         <td class="TDvwvInfo" align="left"></td>
        </tr>

        <tr>
         <td class="TDvwvInfo" align="left" nowrap><STRONG>Users found</STRONG><br><FONT size=2>Select from list and hit "Select" to add</FONT></td>
         <td class="TDvwvInfo" align="middle"></td>
         <td class="TDvwvInfo" align="left" valign=top><STRONG>Get User ID</STRONG><br></td>
        </tr>

        </thead>

        <tr>
         <td class="TDvwv" align="left" width="33%" rowspan=2  valign=top><span id="idUsers">   </span> </td>               
         <td class="TDvwvInfo" align="middle" valign=top width="33%">
         <input  type="button" value="Select &gt;" name="Add" onclick="SubmitOnclick('Add', idTOList);"><br><br>&nbsp;
         </td>
         <td class="TDvwv" align="left" width="33%"  valign=top>
          <select id="idTOList" size="5" style="WIDTH: 190px" LANGUAGE=javascript onkeydown="return List_onkeydown(this)"> </select><br>&nbsp;
          <br />
          <b style="color:red">* Only add one user, if you added the wrong user click cancel and try again.</b>
          </td>
        </tr>

            <tr>
                 <td align=middle  valign=top>
                 <!-- <input type="hidden" value="CC  >" name="CC" onclick="SubmitOnclick('Add', idCCList);" disabled="disabled"><br><br>&nbsp;--> <!--INPUT name=Remove onclick="SubmitOnclick('Remove');" type=button value="  < Remove"--></td>
                 <td align=left  valign=top>
                  <!--<select id=idCCList size=5 style="WIDTH: 190px" LANGUAGE=javascript onkeydown="return List_onkeydown(this)" disabled="disabled" visible="false"></select></td>-->

            </tr>

        <tr>
         <td align="middle" ></td>
         <td align=middle></td>
         <td align=left>
          <input type="button" value="OK" name="OK" onclick="SubmitOnclick('OK',null);">&nbsp;&nbsp;
          <input type="button" value="Cancel" name="Cancel" onclick="SubmitOnclick('Cancel',null);"></td>
        </tr>
    </table>

</body>
</html>

5 个答案:

答案 0 :(得分:1)

您无法通过从javascript设置值来进行更改事件。以下是使用触发器的示例。

 <script>
       $(document).ready(function () {

           $(".tbAdd_Sowner").on('change', function () {
               var owner = $('.tbAdd_Sowner').val();
               $('.tbAdd_Sphone').val(owner);
           });

           $(".aGetID").on('click', function () {
               var tbOwner = $('.tbAdd_Sowner');
               var hidden1 = $('.Hidden1');
               var hidden2 = $('.Hidden2');
               var hidden3 = $('.Hidden3');
               GalModalTOCCDialog(hidden1, tbOwner, hidden2, hidden3);

           });

           function GalModalTOCCDialog(Hidden1, tbAdd_Sowner, Hidden2, Hidden3) {
               $(tbAdd_Sowner).val(' ').trigger('change');
           }

           $('.tbAdd_Sowner').change(function () {
               $(this).removeAttr('disabled');

           });
       });
    </script>

这是您的代码,删除那些验证器

<table>
        <tr>
            <td align="right">Secondary Owner
            </td>
            <td>
                <input id="Hidden1" type="hidden" value="1" class="Hidden1"  />
                <asp:TextBox ID="tbAdd_Sowner" OnTextChanged="tbAdd_Sowner_TextChanged" CssClass="tbAdd_Sowner" AutoPostBack="true" runat="server" Enabled="false"   ></asp:TextBox>
                <input id="Hidden2" type="hidden" class="Hidden2" />
                <input id="Hidden3" type="hidden" class="Hidden3" />
                <a href="javascript:void(0)" id="aGetID" class="aGetID" >Get User ID</a>

            </td>
        </tr>
        <tr>
            <td align="right">Secondary Owners</td>
            <td>
                <asp:TextBox ID="tbAdd_Sphone" runat="server" CssClass="tbAdd_Sphone" ></asp:TextBox>

            </td>
        </tr>
    </table>

服务器端。

protected void tbAdd_Sowner_TextChanged(object sender, EventArgs e)
        {
            tbAdd_Sowner.Text = "123";
        }

答案 1 :(得分:1)

通过JavaScript更改tbAdd_Sowner的值(我假设通过您的GalModalTOCCDialog函数)并不会触发onchange事件。

设置值后,您可以手动触发该事件:

document.getElementById('tbAdd_Sowner').onchange();

虽然我很惊讶你没有像@IrfanTahirKheli那样getElementById出现问题,这对你来说应该没问题......所以你可能会遗漏一些我们需要正确帮助您的标记。

您需要强烈考虑的其他事项是不使用内联样式而不使用表格进行格式化。

由于您似乎对我添加的内容有疑问,这是另一种方式。从您的onChange中移除asp:TextBox,然后从javascript:

执行此操作
 document.getElementById('tbAdd_Sowner').value = 'somevalue';
 document.getElementById('tbAdd_Sowner').onchange = getUserID();

答案 2 :(得分:1)

使用

document.getElementById('<%= tbAdd_Sphone.ClientID %>')

而不是

document.getElementById('tbAdd_Sphone')

MSDN Control.ClientID Property

答案 3 :(得分:0)

正如其他人在答案中提到的那样,

  <asp:TextBox id="tbAdd_Sphone" runat="server" />

将为生成的HTML添加前缀的服务器端动态客户端ID。如果您在选择的浏览器中看到页面的源代码(或使用开发人员工具),您会注意到ID与您传入方法调用的ID不同,即:

<textarea id="ctl00_OuterASPControlID_tbADD_Sphone"></textarea>

如果类动态地添加了类,则可以使用class =“tbAdd_Sphone”将className保持为静态。或者,尝试通过ID

获取元素
<%=tbAdd_Sphone.ClientID %>

You can either set the ClientID mode to static,或者您可以尝试使用UniqueID。

另外需要注意的是,javascript有一个特殊的行为。如果调用在调用中正确传入的一组变量的方法,它将只在函数中使用这些值。如果传入调用的空/未定义数据,则其余参数将被忽略。

functionName:function(parameter1, parameter2) { 

            //Default behavior can be overridden if parameter2 is not passed in as expected.
            if(parameter2 ==null || parameter2=='undefined') { 
                parameter2 = "Some value"; 
                    } 
}


    functionName("testPar1");               //Works but parameter2 is not passed in as expected
    functionName("testPar1", "testPar2");   //Works
    functionName("testPar1", undefined);    //Works, but parameter2 is not passed in as expected

如果您需要使用手机ID,请执行子串搜索以获取实际ID的元素,或使用javascript中的getElementsByTag搜索文本框,并且您可以使用任何其他属性,例如Javascript:

var x = document.getElementsByTag("textbox"); 
if(x!=null && x.attribute('class') == 'tbAdd_Sphone' )  { 
 var valueX = x.attribute('value'); 
}

答案 4 :(得分:0)

使用此<asp:TextBox ID="TextBox1" runat="server" onkeypress="document.getElementById('id').Value=this.value;" />