页面上弹出“消息提示框”的cs

1）aspx页面关键句

<%= ClientScript.GetCallbackEventReference(this, "arg", "InitedMsgBox", null)%>;

 

2）初始化：很可能需要在Page_Load中使用

this.ClientScript.GetCallbackEventReference(this, "arg", "context", null);//初始化CallBack

初始化的目的在于使ICallbackEventHandler接口中的方法可以正确的被调用。

也可以使用 Page.ClientScript.GetCallbackEventReference(Page, "argument", "processCallbackResult", "context", true);

processCallbackResult是arcgis server环境中自带的一个javascript函数（具体位置：C:/Inetpub/wwwroot/aspnet_client/ESRI/WebADF/JavaScript/display_dotnetadf.js(181):function processCallbackResult(response, context) ）

 

3）消息提示框的内容的实现：可以通过页面对ICallbackEventHandler接口的继承

    private string _callbackArg;

    string ICallbackEventHandler.GetCallbackResult()
    {
        return RaiseCallbackEvent(_callbackArg);
    }

    void ICallbackEventHandler.RaiseCallbackEvent(string eventArgument)
    {
        _callbackArg = eventArgument;
    }

    //获取传回页面的字符串

    public virtual string RaiseCallbackEvent(string responseString)
    {
        UserInfo ui = (UserInfo)Session["SessionUserInfo"];
        if (ui == null || ui.userID == 0) return "";
        // break out the responseString into a querystring
        Array keyValuePairs = responseString.Split("&".ToCharArray());
        NameValueCollection m_queryString = new NameValueCollection();
        string[] keyValue;
        string response = "";
        if (keyValuePairs.Length > 0)
        {
            for (int i = 0; i < keyValuePairs.Length; i++)
            {
                keyValue = keyValuePairs.GetValue(i).ToString().Split("=".ToCharArray());
                m_queryString.Add(keyValue[0], keyValue[1]);
            }
        }
        else
        {
            keyValue = responseString.Split("=".ToCharArray());
            if (keyValue.Length > 0)
                m_queryString.Add(keyValue[0], keyValue[1]);
        }
        // isolate control type and mode
        string controlType = m_queryString["ControlType"];
        string eventArg = m_queryString["EventArg"];
        if (controlType == null) controlType = "IsNull";
        string sql = string.Empty;
        DataTable dt = null;
        int chkNum = 0, chkNewNum = 0, chkMsgNum = 0, ShareNum = 0, ShareNewNum = 0;
        int newCount = 0, chkPassNum = 0, chkRejectNum = 0;
        switch (controlType)
        {
            case "QueryMsg":

                break;

            case "Ctluserzone1_DrpCountry":

                break;

            case "Ctluserzone1_drpProvince":

                break;

            case "Ctluserzone1_drpCity":

                break;

            default:
                break;
        }
        return response;
    }

 

4）把设置好的控件转化为html字符串

    private string GetHtmlContent(Control control)
    {
        System.IO.StringWriter sw = new System.IO.StringWriter();
        HtmlTextWriter writer = new HtmlTextWriter(sw);
        control.RenderControl(writer);
        string htmlContent = sw.ToString();
        sw.Close();
        return htmlContent;
    }