在return语句后调用javascript函数

问题描述：

大家好

请帮我解决以下问题。

我已提交表格有3个选项 - 1.文字，2.视频，3.图像

如果用户从上面选择任何一个选项，那么相应的div将会打开。

我的javascript函数是 -

Hi All
Please help me with below issue.

I have submit form in which there are 3 options- 1. Text,2.Video,3.Image
if user select anyone option from above then respective div will open.

my javascript function is-

function fn_radio()
{

//var form1="ContentPlaceHolder1";
var form1="ctl00_ContentPlaceHolder1";
//alert("hi");

if(document.getElementById(form1+'_rdo_text').checked)
{
//alert("text");
    document.getElementById("hidden_radio").value= "text";
    document.getElementById("div_text").style.display="block";
    document.getElementById("div_video").style.display="none";
    document.getElementById("div_image").style.display="none";
    document.getElementById("plus1").style.display="none";
}
if(document.getElementById(form1+'_rdo_video').checked)
{
//alert("video");
    document.getElementById("hidden_radio").value= "video";
    document.getElementById("div_video").style.display="block";
    document.getElementById("div_text").style.display="none";
    document.getElementById("div_image").style.display="none";
    document.getElementById("plus1").style.display="none";
}
if(document.getElementById(form1+'_rdo_image').checked)
{
//alert("image");
    document.getElementById("hidden_radio").value= "images";
    document.getElementById("div_text").style.display="none";
    document.getElementById("div_video").style.display="none";
    document.getElementById("div_image").style.display="block";
    document.getElementById("plus1").style.display="block";
}

 return true;   // return false to stop postback
}

现在问题是 - 我正在检查文件后面的代码中的图像大小。如果它返回false，那么我想调用上面的函数。

该怎么办？

请帮帮我...

Now the problem is- i am checking image size in code behind file. n if it returns false then i want to call above function.

what to do?
Pls help me out...

答

将此行添加到您要调用js函数的代码中： -

Add this line to your code from where you want to call js function:-

ScriptManager.RegisterStartupScript(this, GetType(), "radioEle", "fn_radio();", true)

Hi Sweetynewb，好时光。 ..

你可以尝试这个策略：

***在服务器端（代码隐藏） file / .cs文件）

Hi Sweetynewb , good time...

you can try this strategy:

*** In Server side ( Code-Behind file / .cs file )

protected void BtnSubmit_clicked (object sender , eventargs e)
{
// check your image size here
if ( size is okay)
// do some thing
else
{
string str = "fn_radio();";
ClientScript.RegisterStartupScript(this.GetType , "myScript" , str , true);
}
}

在你的代码中包括以下条件的条件：

In your code behind include the following code on condition:

System.Text.StringBuilder JSText = new System.Text.StringBuilder();
JSText.Append(@"<script language='javascript'>");
JSText.Append(@"fn_radio();");
JSText.Append(@"</script>");
 
if (!ClientScript.IsStartupScriptRegistered("MyScript"))
{
ClientScript.RegisterStartupScript(this.GetType(), "MyScript", JSText .ToString());
}

如果您使用的是AsyncPostback，则必须使用ScriptManager.RegisterStartupScript

If you are using AsyncPostback, you will have to use ScriptManager.RegisterStartupScript

在return语句后调用javascript函数

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