Question

I have some other javascript functions that are being set on the onfocus and onblur events of the textbox that I am using. In these functions it calls a generic javascript function that is not related to any controls. I want to know how to just simply spit this function out to the html of the page from the code behind. Something like this…

Page.ClientScript.RegisterStartupScript(this.GetType(), "?????", getCounter);

EDIT: Here is what I mean

public class MVADTextBox : TextBox
        {
 protected override void OnLoad(EventArgs e)
            {
 var getCounter = "<script language=\"javascript\">" +
                                "function GetCounter(input) {" +
                                    //this function gets the number of special characters taht are in a row.
                                    //it is only the grouping of characters that are right after your current position
                                    "var textbox = document.getElementById(input.id);" +
                                    "var mask = textbox.getAttribute('Mask');" +
                                    "var inputCharacters = textbox.getAttribute('InputCharacters');" +
                                    "var tbid = \"#\" + input.id;" +
                                    "var position = $(tbid).caret().start;" +
                                    "var counter = 0;" +
                                    "for (var i = position; i < mask.length; i++) {" +
                                    "     if (mask[i] != '#') {" +
                                    "        counter++;" +
                                    "        if (mask[i + 1] == '#') {" +
                                    "            break;" +
                                    "        }" +
                                    "    }" +
                                    "}" +
                                    "return counter;" +
                               " }" +
                            "</script>";

                            Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "OnFocus", onFocus);
                            Page.ClientScript.RegisterStartupScript(this.GetType(), "GetCounter(input)", getCounter);



var onBlur = "<script language=\"javascript\"> function PopulateField(input) {if (input.value == \"\") {input.value = input.defaultValue; input.className = 'sampleText'; } } </script>";


  Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "OnFocus", onFocus);

  Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "OnBlur", onBlur);
    }
}

The on blur method is getting sent to the page.

Answer 1

Answer:

I believe that Page.ClientScript has been deprecated. You should be using ClientScriptManager.

Replace your "?????" with the name of the script. Honestly, the name of the script is almost useless (unless you need to check for its existence later on).

ClientScriptManager.RegisterStartupScript(this.GetType(), "myCount", getCounter);

Usage Clarification:

//You must surround your code with script tags when not passing the bool param
ClientScriptManager.RegisterStartupScript(this.GetType(),
                   "myCount",
                   "<script>alert('Hey')</script>");

// The last param tells .Net to surround your
// code with script tags (true) or not (false)
ClientScriptManager.RegisterStartupScript(this.GetType(),
                   "myCount",
                   "alert('Hey')", true);

Additional Information:

Signatures from MSDN:

public void RegisterStartupScript(
    Type type,
    string key,
    string script
)

public void RegisterStartupScript(
    Type type,
    string key,
    string script,
    bool addScriptTags
)

See: http://msdn.microsoft.com/en-us/library/system.web.ui.clientscriptmanager.registerstartupscript.aspx