Replace Error values in Power BI data model

Here is the Sample Excel data source I’ve created for this Example. Here we will replace the error values in our Query Editor. MyCol3 is Sum of the first 2 columns. Once imported in the data model in Power BI, the 2 rows with values a and b in MyCol2 will show Error in MyCol3.

Import the Excel as below:
Get Data->Excel->Select the Excel file from which you want to import->Select the Sheet you created with the Preview.

Importing the sheet shows the following dialog box:

The data model is shown as below in Power BI:

Right-click on MyCol3 and select Edit Query. This will open the Query Editor.

In the Query Editor, right-click on MyCol3 and Select Replace Errors:

Same option is available in Replace Values drop-down menu under Home Tab in the Ribbon.

Enter the required value to replace with Error and click OK:

The Final values in the data model will be visible as below:

The Applied Steps in the Query Editor will be shown as below for Sheet1 data model:

Click on Close & Apply in the Home Tab to save your changes.

Prevent form submission with Javascript button click

Suppose you have a html form and you need to prevent the submission of a form based on the input provided in a textbox.
The html input type should be “button” in this case.

<input type="button" value="Submit" onclick="checkInput();">

Below is the Javascript code that gets called on the button click:

function checkInput() {
	var form = document.getElementById('form1');
	var str = document.getElementById("txtBox").value; 
	if (str == "") {
		var r = confirm("Do you want to add the detail in the input box?");
		if (r == true) {
		} else {
	else {

The above code will submit the form if field is not blank. If the field is blank, focus gets set to the textbox field named “txtBox” when clicking on OK button. Clicking on Cancel will again submit the form.

Difference between href with blank pound and javascript void 0

href=”” reloads the current page

href=”#” will scroll the current page to the top

href=”javascript: void(0)” will do nothing. However, this fires the onbeforeunload event. I had a problem in my classic asp application that was causing the progress bar to show up every time the href was clicked to open a pop-up window.

You can get the same effect of javascript: void(0) by returning false from the click event handler of the anchor with either of the other two methods as well.

Use the below anchor link:

<a id="my-link" href="#">Link</a> 

and then bind an event handler to the click listener somewhere in my javascript like:

document.getElementById('my-link').onclick = function(){ 
    // Do something
    return false;

This way, since you’re using #, even if the user has javascript disabled the page won’t reload (it will just scroll to the top), and it’s a lot cleaner looking than javascript: void(0).

Also, this does not fire the window.onbeforeunload event.

Debug classic asp application hosted on IIS with Visual Studio

Some non .Net Applications like the ones written in classic ASP are required to be debugged in Visual Studio. Since these are not hosted on IIS Express, but on IIS, you need to identify the worker process running your machine or the Server and attach the w3wp.exe with the Debug tool in Visual Studio.

Enable Debugging under IIS classic ASP section as shown below:

Under the Debug menu in Visual Studio, select “Attach to Process”:

There may be multiple worker processes running on the machine depending on how many applications are running under IIS. Match the right one with the correct ProcessID.

Add the debug points in your Asp file and hit the required Page in the browser.

Check incoming requests IIS with Request Monitor

Enable the Request Monitor feature for IIS Server from the Server Manager. Do the Role-based or feature-based installation.

Click on install on the final screen:

When the installation completes, open IIS Manager (inetmgr.exe), select Server name and open Worker processes.

Select a worker process for which you want to monitor the incoming requests. Click on View Current Requests option as shown below on the right pane:

The Request details will be visible as shown in the below screen.

How to use package save-svg-as-png to download png image

This post explains how to use the package save-svg-as-png to download the png image of the contents in your svg element in your React component.

Create a basic React App as previously discussed in this post.

Create a component ImageWrapper as shown below:

import React from 'react'

export default class ImageWrapper extends React.Component {

  constructor(props) {
    this.state = {

  render() {
    return (
          <svg id={"svg-chart"} viewBox="0 0 10 10" xmlns="">
            <rect x="0" y="0" width="100%" height="100%"/>
            <circle cx="50%" cy="50%" r="2" fill="white"/>

Install the following package in your App with the command:

npm install save-svg-as-png

Modify the code in your App.js file as shown below:

import React, { Component } from "react";
import "./App.css";
import ImageWrapper from "./components/ImageWrapper";

const saveSvgAsPng = require('save-svg-as-png')

const imageOptions = {
  scale: 5,
  encoderOptions: 1,
  backgroundColor: 'white',

class App extends Component {

  handleClick = () => {
    saveSvgAsPng.saveSvgAsPng(document.getElementById('svg-chart'), 'shapes.png', imageOptions);

  render() {
    return (
      <div className="App">
        <ImageWrapper />
        <br />
        <button onClick={this.handleClick}>Download Image</button>

export default App;

Run the App with:

npm start

Click on the button Download Image to test.

Change Javascript attribute for textbox using c#

Suppose we have the following textbox in a UserControl with the onfocusout javascript method that passes validation as 50000 characters.

<telerik:RadTextBox TextMode="MultiLine" ID="txtComments" onfocusout="return CheckLength(this, 50000);" Height="100px"  runat="server" CssClass="TextMulti" Width="99%" EnableSingleInputRendering="False">

For a particular scenario, you may need to change the number of characters to say 6000.

This can be done dynamincally in the UserControl C# code as below:

txtComments.Attributes["onfocusout"] = "return CheckLength(this, 6000);";