Nếu bạn đang gặp khó khăn trong việc chèn thêm button trên Toolbar của FreeTextBox thì bài viết này sẽ giúp bạn làm được điều đó. Ví dụ mình họa sẽ là Chèn code C#, VB,.. như trên hình
<%@ Page language="c#" ValidateRequest="false" %>
<!doctype html public "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD runat="server">
<title>Insert Code</title>
<base target="_self">
<script language="C#" runat="server">
private void Page_Load(object sender, System.EventArgs e) {
}
</script>
<style type="text/css">
.hiddenText {
display: none;
}
</style>
<META HTTP-EQUIV="Expires" CONTENT="0">
</HEAD>
<body style="PADDING-RIGHT:10px; PADDING-LEFT:10px; PADDING-BOTTOM:10px; PADDING-TOP:10px">
<form id="Form1" runat="server">
<asp:dropdownlist id="languageDropDown" runat="server">
<asp:listitem value="C#">C#</asp:listitem>
<asp:listitem value="VB.NET">VB.NET</asp:listitem>
<asp:listitem value="J#">J#</asp:listitem>
<asp:listitem value="T-SQL">T-SQL</asp:listitem>
<asp:listitem value="JScript">JScript</asp:listitem>
</asp:dropdownlist>
<br>
<asp:textbox id="sourceTextBox" textmode="multiline" columns="60" rows="10" runat="server" Width="100%" />
<br>
<asp:button id="parseButton" onclick="parseButton_Click" text="Parse Code" runat="server" />
<INPUT id="Button1" type="button" onclick="returnCode()" value="Insert Code" name="Button1"
runat="server">
<asp:Checkbox runat="server" id="chkLeftJustify" text="Left Justify"></asp:Checkbox>
<hr>
<pre style="FONT-SIZE: 11px; FONT-FAMILY: Courier New"><asp:literal id="resultLabel" runat="server"/>
<asp:TextBox id=codeText runat="server" Width="0px" Height="0px" CssClass="hiddenText" TextMode="MultiLine"></asp:TextBox>
</form>
<script language="javascript">
function returnCode() {
var text;
text = document.getElementById('codeText').value;
if (window.opener) {
window.opener.addTextToPost(text);
} else {
window.returnValue = text;
}
window.close();
}
</script>
<script language="c#" runat="server">
void parseButton_Click(object sender, EventArgs e)
{
string result;
result = sourceTextBox.Text;
//-- If the user selected to left justify
//-- then apply it here.
if (chkLeftJustify.Checked)
{
result = LeftJustifyCode(result);
}
sourceTextBox.Text=result;
AylarSolutions.Highlight.Highlighter h = new AylarSolutions.Highlight.Highlighter();
h.ConfigurationFile = Server.MapPath("CodeHighlightDefinitions.xml");
h.OutputType = AylarSolutions.Highlight.OutputType.Html;
result = h.Highlight(result, languageDropDown.SelectedValue);
result = result.Replace("\t", " ");
resultLabel.Text = result;
codeText.Text = "<pre>" + result + "</pre>";
}
/// <summary>
/// Removes white space from the left of a block of
/// code w/o removing formatting tabs.
/// </summary>
/// <param name="result">string to be formatted.</param>
/// <returns></returns>
String LeftJustifyCode(String result)
{
// replace tabs with 4 spaces
result = Regex.Replace(result, "\t", " ");
//-- Break the string into lines
////String[] delim ={Environment.NewLine};
char[] delim = Environment.NewLine.ToCharArray();
// System.StringSplitOptions is not supported in the 1.1 Framework
////String[] lines = result.Split(delim,System.StringSplitOptions.RemoveEmptyEntries);
String[] tempLines = result.Split(delim);
// convert the array into an ArrayList
System.Collections.ArrayList lineList = new System.Collections.ArrayList();
foreach (String line in tempLines)
{
// only add nonblank lines to the list
if (line.Trim().Length > 0)
{
lineList.Add(line);
}
}
// convert the ArrayList back into an array
String[] lines = (String[])lineList.ToArray(typeof(String));
//-- we need to find the min space at the start of any of the lines.
int minSpacing = 100; // start at 100, work our way back.
//-- loop through the lines
for (int i = 0; i < lines.Length ; i++)
{
int tempSpacing=0;
int charVal=0;
//-- loop through the characters in this line
for (int j = 0; j < lines[i].Length; j++)
{
charVal = (int)lines[i].Substring(j,1)[0]; // use the ASCII code of the character
if (charVal == 32) // space
{
tempSpacing++;
}
else
{
break;
}
}
//-- if the spacing is less, then use it.
if (tempSpacing < minSpacing)
{
minSpacing = tempSpacing;
}
}
//-- strip away the extra spaces
if (minSpacing > 0){
//-- create a string we can replace
System.Text.StringBuilder sb = new System.Text.StringBuilder();
sb.Append(Environment.NewLine);
//for (int j = 0;j<minSpacing;j++)
//{
// sb.Append(" ");
//}
sb.Append(new string(' ', minSpacing - 1)); // refactored the loop
//-- remove the space from the first line
result = result.Substring(minSpacing);
//-- remove the space from the rest of the lines
result = result.Replace((String)sb.ToString(),(String)Environment.NewLine);
}
return result;
}
</script>
</body>
</HTML>
if (!app.EndsWith("/"))
{
app += "/";
}
if (txtContent.Visible && txtContent.EnableHtmlMode)
{
Toolbar myToolbar = new Toolbar();
ToolbarButton myButton = new ToolbarButton("Chèn Code", "insertCode");
string insertCodeCallback = @"<script type=""text/javascript"">"; insertCodeCallback += "var ftbReference;function setFtbReference(ftbRef)";
insertCodeCallback += "{this.ftbReference = ftbRef;}"; insertCodeCallback += "function addTextToPost(html){ "; insertCodeCallback += "ftbReference.InsertHtml(html);}</script>";
this.RegisterClientScriptBlock("insertCodeCallback", insertCodeCallback);
string scriptBlock = "var codescript = '" + "" + @"ftb/ftb.insertcode.aspx';";
scriptBlock += "if (FTB_Browser.isIE)";
scriptBlock += "{code = showModalDialog(codescript,window,'dialogWidth:400px;"; scriptBlock += " dialogHeight:500px;help:0;status:0;resizeable:1;');";
scriptBlock += "if (code != null) {this.ftb.InsertHtml(code);}} "; scriptBlock += "else {setFtbReference(this.ftb);"; scriptBlock += "window.open(codescript, 'insertcode', 'width=550,height=500,";
scriptBlock += "resizable=yes,scrollbars=yes,status=no,modal=yes,dependent=yes,dialog=yes');}";
myButton.ScriptBlock = scriptBlock;
txtContent.SupportFolder = app;
myButton.ButtonImage = "csharp";
myToolbar.Items.Add(myButton);
txtContent.Toolbars.Add(myToolbar);
}