private void WriteScripts()
{
string script = string.Format("var {0}_Max = {1};", this.ClientID, MaxLength);
string scriptKey = string.Format("{0}_script", this.ClientID);
Javascript.RegisterClientScriptBlock(this.Page, scriptKey, script, true);
//Page.ClientScript.RegisterClientScriptBlock(typeof(Page), scriptKey, script, true);
//in case there is 2 LimitTextBoxes only add this function once
string limitFuncKey = "LimitFunction";
if (!Page.ClientScript.IsClientScriptBlockRegistered(limitFuncKey))
{
StringBuilder sb = new StringBuilder();
sb.Append("function LimitTextArea(c, counterName, maxLen) {");
sb.Append("var counter = document.getElementById(counterName);");
sb.Append("if (counter != null){");
sb.Append("var len = c.value.length;");
sb.Append("if (len > maxLen) {");
sb.Append("c.value = c.value.toString().substr(0, maxLen);");
sb.Append("} else {");
sb.Append("counter.innerHTML = maxLen - len;}}}");
Javascript.RegisterClientScriptBlock(this.Page, limitFuncKey, sb.ToString(), true);
//Page.ClientScript.RegisterClientScriptBlock(typeof(Page), limitFuncKey, sb.ToString(), true);
}
//set the start script
string startScript = string.Format("if (document.getElementById('{0}') != null) document.getElementById('{0}').innerHTML = {2}_Max - document.getElementById('{1}').value.length;", lblCount.ClientID, txtText.ClientID, this.ClientID);
string startKey = string.Format("{0}_start", this.ClientID);
Javascript.RegisterStartupScript(this.Page, startKey, startScript, true);
//Page.ClientScript.RegisterStartupScript(typeof(Page), startKey, startScript, true);
txtText.Attributes.Add("onKeyUp", string.Format("LimitTextArea(this, '{0}', {1}_Max);", lblCount.ClientID, this.ClientID));
}