如何从C#PageLoad调用Javascript

本文关键字：调用 Javascript C#PageLoad | 更新日期: 2023-09-27 18:00:40

我想问如何从C#页面加载中调用javascript。我的Javascript是

function Hide(lst) {
        if (document.getElementById) {
            var tabList = document.getElementById(lst).style;
            tabList.display = "none";
            return false;
        } else {
            return true;
        }
    }

并希望从页面加载调用

if (dtSuperUser(sLogonID).Rows.Count < 1)
        {
            //Call Javascript with parameter name tablist
        }

感谢

如何从C#PageLoad调用Javascript

实际上，您可以使用pageOnload事件来执行此操作。就像这样。

 protected void Page_Load(object sender, EventArgs e)
        {           
            if (IsPostBack)
            {
                this.ClientScript.RegisterStartupScript(this.GetType(), "show", "<script>document.getElementById('Your element').style.display = 'block'</script>");
            }
            else
            {
                this.ClientScript.RegisterStartupScript(this.GetType(), "show", "<script>document.getElementById('Your element').style.display = 'hidden'</script>");
            }
        }

String csName = "myScript";
Type csType = this.GetType();
// Get a ClientScriptManager reference from the Page class.
ClientScriptManager cs = Page.ClientScript;
// Check to see if the client script is already registered.
if (!cs.IsClientScriptBlockRegistered(csType, csName))
{
  cs.RegisterClientScriptBlock(csType, csName, 
      string.Format("Hide({0})", lst.ClientID));
}

RegisterStartupScript("Hide", string.Format(@"if (document.getElementById) {
        var tabList = document.getElementById('{0}').style;
        tabList.display = 'none';
        return false;
    } else {
        return true;
    }",lst));

或者，如果您已经在Markup 中呈现了Javascript函数

RegisterStartupScript("Hide",string.Format("Hide('{0}');",lst));

您使用的是webforms还是MVC？如果使用网络表单检查：

http://msdn.microsoft.com/en-us/library/Aa479011

Page.RegisterStartupScript("MyScript",
   "<script language=javascript>" +
   "function AlertHello() { alert('Hello ASP.NET'); }</script>");
Button1.Attributes["onclick"] = "AlertHello()";
Button2.Attributes["onclick"] = "AlertHello()";
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