将变量从后面的代码传递给 javascript 函数
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passing a variable to javascript function from code behind
提问by Arianule
I want to pass a string value to a javascript function from code behind. As it is a the moment I get an uncaught reference error explaining that the value is not defined.
我想将一个字符串值从后面的代码传递给一个 javascript 函数。因为这是我收到未捕获的参考错误的那一刻，说明该值未定义。
var variable= txtVariable.Value;
ScriptManager.RegisterStartupScript(this.Page, this.GetType(), "Registering", "RegisterTheUser("+variable+");", true);
Advice perhaps on the correct syntax
可能对正确语法的建议
This is the function
这是功能
function RegisterTheUser(val) {
alert(val);
}
regards
问候
回答by sbhomra
What you have posted looks fine. I've used the following without any issue:
您发布的内容看起来不错。我使用了以下没有任何问题：
ScriptManager.RegisterStartupScript(this, typeof(string), "Registering", String.Format("RegisterTheUser('{0}');", myVariable), true);
Can you try using the example I have posted?
您可以尝试使用我发布的示例吗？
回答by margabit
The problem might be that your RegisterStartupScriptis being executed before loading the function RegisterTheUser.
问题可能是您RegisterStartupScript在加载函数之前正在执行RegisterTheUser。
You need to sort out the order of the loading of the scripts or add some logic to call this function only after the documentis ready.
您需要理清脚本的加载顺序或添加一些逻辑以在document准备好后才调用此函数。
In jQuery is done like this:
在 jQuery 中是这样完成的：
ScriptManager.RegisterStartupScript(this.Page, this.GetType(), "Registering", "$(document).ready(function(){ RegisterTheUser("+variable+"); });", true);
As sbhomra pointed in his answer, if the value is a string you might need to add single qoutes. Not needed if it's a number.
正如 sbhomra 在他的回答中指出的那样，如果该值是一个字符串，您可能需要添加单个 qoutes。如果是数字则不需要。
