[英]Javascript eval String + variable
I have a piece of javascript code evaluated at runtime, with the <%= %> syntax... 我在运行时用<%=%>语法评估了一段JavaScript代码...
Now, inside the <%= %>, instead of a hard coded string, i'd like to have the value stored in a variable... How can I do this? 现在,在<%=%>内,我希望将值存储在变量中,而不是硬编码的字符串中,该怎么办?
This is the function: 这是功能:
function updateDescriptionLabel(msgToParse, dataColumn, TextBoxID) {
var myData = JSON.parse(msgToParse.d);
alert(msgToParse);
alert(dataColumn);
alert(TextBoxID);
// this is the explicit call, it's ok
$('#' + '<%= this.TextBoxDES_MACCHINA.ClientID %>').val($.trim(myData["DescrMacchina"]));
// NOW i want to make the call by using the variable value
var txtDes = TextBoxID;
$('#' + '<%= this.' + txtDes.toString() + '.ClientID %>').val($.trim(myData["DescrMacch"]));
// BUT i get the error: Too many characters in character literal
}
============== EDIT =============== =============编辑===============
I have a bunch of TextBoxID that, on lost focus, get a get a value from database, and display it on the appropriate TextBoxDESCRIPTION related to the ID... But I have to duplicate the code for each TextBox, so I'd like to generalize it... 我有一堆TextBoxID,失去了焦点,就从数据库中获取了一个值,并将其显示在与ID相关的适当TextBoxDESCRIPTION上。但是我必须为每个TextBox复制代码,所以我想概括一下...
I post the entire code. 我发布了整个代码。
<script language="javascript" type="text/javascript">
/* ==> JSON */
//Ajax Request
function SendAjaxRequest(urlMethod, jsonData, returnFunction) {
$.ajax({
type: "POST",
contentType: "application/json; charset=utf-8",
url: urlMethod,
data: jsonData,
dataType: "json",
success: function (msg) {
// Do something interesting here.
if (msg != null) {
returnFunction(msg);
}
},
error: function (xhr, status, error) {
// Boil the ASP.NET AJAX error down to JSON.
var err = eval("(" + xhr.responseText + ")");
// Display the specific error raised by the server
alert(err.Message);
}
});
}
// I'd like to generalize it ...
function SendComplexAjaxRequest(urlMethod, jsonData, returnFunction, dataColumn, TextBoxID) {
$.ajax({
type: "POST",
contentType: "application/json; charset=utf-8",
url: urlMethod,
data: jsonData,
dataType: "json",
success: function (msg) {
// Do something interesting here.
if (msg != null) {
returnFunction(msg, dataColumn, TextBoxID);
}
},
error: function (xhr, status, error) {
// Boil the ASP.NET AJAX error down to JSON.
var err = eval("(" + xhr.responseText + ")");
// Display the specific error raised by the server
alert(err.Message);
}
});
}
// ONE function for each textBox
function callUpdateGuastoAttributes(code) {
var urlMethod = '<% = ResolveClientUrl("~/Services/ws_Attributes.asmx/OdLGetMacchinaAttributes") %>';
var jsonData = "{'COD_MACCHINA':'" + code + "'}";
var successFunction = updateLabelsGuastoAttributs;
SendAjaxRequest(urlMethod, jsonData, successFunction);
}
function callUpdateCausaGuastoAttributes(code) {
var urlMethod = '<% = ResolveClientUrl("~/Services/ws_Attributes.asmx/OdLGetMacchinaAttributes") %>';
var jsonData = "{'COD_MACCHINA':'" + code + "'}";
var successFunction = updateLabelsCausaGuastoAttributs;
SendAjaxRequest(urlMethod, jsonData, successFunction);
}
// I can have only one function:
function callUpdateMacchinaAttributes(code) {
var urlMethod = '<% = ResolveClientUrl("~/Services/ws_Attributes.asmx/OdLGetMacchinaAttributes") %>';
var jsonData = "{'COD_MACCHINA':'" + code + "'}";
var successFunction = updateDescriptionLabel;
SendComplexAjaxRequest(urlMethod, jsonData, successFunction, 'DescrMacchina', 'TextBoxDES_MACCHINA');
}
/* <== CALLBACK */
function updateLabelsMacchinaAttributs(msg) {
var myData = JSON.parse(msg.d);
$('#' + '<%= this.TextBoxDES_MACCHINA.ClientID %>').val($.trim(myData["DescrMacchina"]));
}
function updateLabelsGuastoAttributs(msg) {
var myData = JSON.parse(msg.d);
$('#' + '<%= this.TextBoxDES_GUASTO.ClientID %>').val($.trim(myData["description"]));
}
function updateLabelsCausaGuastoAttributs(msg) {
var myData = JSON.parse(msg.d);
$('#' + '<%= this.TextBoxDES_CAUSA_GUASTO.ClientID %>').val($.trim(myData["description"]));
}
// BUT I have to generalize it...
function updateDescriptionLabel(msgToParse, dataColumn, TextBoxID) {
var myData = JSON.parse(msgToParse.d);
alert(msgToParse);
alert(dataColumn);
alert(TextBoxID);
// this is the explicit call
$('#' + '<%= this.TextBoxDES_MACCHINA.ClientID %>').val($.trim(myData["DescrMacchina"]));
// i want to make the call by using the variables values
var dCol = dataColumn;
var txtDes = TextBoxID;
$('#' + '<%= this.' + txtDes.toString() + '.ClientID %>').val($.trim(myData[dCol]));
// i get the error: Too many characters in character literal
}
I propose such solution (depending on your other code...) : 我提出了这样的解决方案(取决于您的其他代码...):
function updateDescriptionLabel(msgToParse, dataColumn, TextBoxID) {
var myData = JSON.parse(msgToParse.d);
alert(msgToParse);
alert(dataColumn);
alert(TextBoxID);
// this is the explicit call, it's ok
$('#' + '<%= this.TextBoxDES_MACCHINA.ClientID %>').val($.trim(myData["DescrMacchina"]));
// NOW i want to make the call by using the variable value
$('#' + TextBoxID).val($.trim(myData["DescrMacch"]));
}
and then when you call this function do this : 然后,当您调用此函数时,请执行以下操作:
updateDescriptionLabel("your message", <yourcolumn>, <%= this.TextBoxDES_MACCHINA.ClientID %>);
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