Is there a way to retrieve text from within a div using code behind in asp.net with c#?

I am currently developing a SQL QUERY editor where users can enter queries. The entered text is then passed to a SQL COMMAND for execution, and the results are displayed to the user in a GRIDVIEW. However, I am facing an issue in retrieving the text entered in a DIV with the attribute contenteditable="true" in the codebehind.

The project consists of three files: html, JScript.js, and StyleSheet.css. I have added a textbox to test retrieving the value in the textbox upon button click, but it is not working. Below is my ASPX code:

<asp:Content ID="Content2" ContentPlaceHolderID="body" Runat="Server">
<form id="form1" runat="server">
<div id="editor" contenteditable="true"></div>
<br />
<asp:Button runat="server" OnClick="load" Text="Submit" />
<asp:TextBox   ID="TextBox1" ForeColor="White" runat="server"></asp:TextBox>
</form>
</asp:Content>

Here is the ASPX.CS code snippet:

public void load(object sender, EventArgs e)
{
HtmlGenericControl footer = (HtmlGenericControl)mainContent.FindControl("editor");
String cmd = footer.InnerHtml.ToString();
TextBox1.Text = cmd;
}

And this is the JScript.js code snippet:

$(function () {
$("#editor").on("keydown keyup", function (e) {
    if (e.keyCode == 32) {
        var text = $(this).text().replace(/[\s]+/g, " ").trim();
        var word = text.split(" ");
        var newHTML = "";

        $.each(word, function (index, value) {
            switch (value.toUpperCase()) {
                case "SELECT":
                case "FROM":
                case "WHERE":
                case "LIKE":
                case "BETWEEN":
                case "NOT LIKE":
                case "FALSE":
                case "NULL":
                case "FROM":
                case "TRUE":
                case "NOT IN":
                    newHTML += "<span class='statement'>" + value + "&nbsp;</span>";
                    break;
                default:
                    newHTML += "<span class='other'>" + value + "&nbsp;</span>";
            }
        });

        $(this).html(newHTML);

        //// Set cursor postion to end of text
        var child = $(this).children();
        var range = document.createRange();
        var sel = window.getSelection();
        range.setStart(child[child.length - 1], 1);
        range.collapse(true);
        sel.removeAllRanges();
        sel.addRange(range);
        $(this)[0].focus();
    }
});
});

Everything seems to be working fine, but I am still trying to figure out how to retrieve the text from the DIV in the codebehind that the user enters in the form of a query. Any help would be appreciated. Thank you.

Answer №1

Don't forget to include the runat=server attribute in your DIV tag if you want to access it in the code-behind like this:

<div id="textbox" runat=server contenteditable="true"></div>

Answer №2

Include runat="server" inside the div tag like this:-

<div id="editor" contenteditable="true" runat="server">Lorem Ipsum</div>

Update your script to use $("div[ID$='editor']") instead of $("#editor") as shown below:

If you add runat="server" after rendering, the Id will automatically change. Your id will no longer be editor due to the runat tag, it will be something like ctl00_body_editor (may vary, just for clarification).

$(function () {
$("div[ID$='editor']").on("keydown keyup", function (e) {
    if (e.keyCode == 32) {
        var text = $(this).text().replace(/[\s]+/g, " ").trim();
        var word = text.split(" ");
        var newHTML = "";

        $.each(word, function (index, value) {
            switch (value.toUpperCase()) {
                case "SELECT":
                case "FROM":
                case "WHERE":
                case "LIKE":
                case "BETWEEN":
                case "NOT LIKE":
                case "FALSE":
                case "NULL":
                case "FROM":
                case "TRUE":
                case "NOT IN":
                    newHTML += "<span class='statement'>" + value + "&nbsp;</span>";
                    break;
                default:
                    newHTML += "<span class='other'>" + value + "&nbsp;</span>";
            }
        });

        $(this).html(newHTML);

        //// Set cursor postion to end of text
        var child = $(this).children();
        var range = document.createRange();
        var sel = window.getSelection();
        range.setStart(child[child.length - 1], 1);
        range.collapse(true);
        sel.removeAllRanges();
        sel.addRange(range);
        $(this)[0].focus();
    }
});
});

Also, make use of the following code:

protected void load(object sender, EventArgs e)
    {       
        ContentPlaceHolder mainContent = (ContentPlaceHolder)this.Master.FindControl("body");
        HtmlGenericControl footer = (HtmlGenericControl)mainContent.FindControl("editor");
        String cmd = footer.InnerHtml.ToString();
        TextBox1.Text = cmd;
    }

Where body is the ContentPlaceHolderID which can be found on your content page

<asp:Content ID="Content2" ContentPlaceHolderID="body" Runat="Server">

Use this HTML for your content page:

<asp:Content ID="Content2" ContentPlaceHolderID="body" Runat="Server">
<div id="editor" contenteditable="true"></div>
<br />
<asp:Button runat="server" OnClick="load" Text="Submit" />
<asp:TextBox   ID="TextBox1" ForeColor="Black" runat="server"></asp:TextBox>
</asp:Content>

This should provide you with the necessary guidance

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