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Implementing Multiselect feature on AutoCompleteExtender

AjaxControlToolkit’s AutoComplete extender is designed to be a single selection control. i.e. When user selects a value the dropdown list will be closed and selected text will be assigned to targeted textbox control.

Recently I got a question on the Asp.net Forums where the user wants to make the AutoCompleteExtender a multi select one. Besides the chosen values should be appended to textbox as comma separated values. This question caught my attention as it was a little tricky.

Here are the details of requirements

  • Keep the dropdown list of options on AutoComplete Extender opened
  • Allow multiple selection on AutoComplete Extender
  • Add the string to target textbox control as comma separated strings

We need to come up with a custom implementation to accomplish this requirement.  When I looked at some threads I found the code to keep the list opened. However, I need to customize it to generate comma separated values.

You can find complete implementation details here

Add a behaviorID to AutocompleteExtender control. We will use this id to close the dropdown list after user selecting values

Now we need to add a button to close the dropdown list after selecting values

Add the following javascript function to your page to close the window

Now we need to customize the inbuilt function “_setText” and “_hideCompletionList” function in order to accomplish our requirement

Complete Code

HTML

C#:

Code to populate the list when user type in characters on textbox

Demo

AutoCompleteExtenderDemo

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Applying css style on cellClass not working in Angular UIGrid

cellClass is an attribute which allows user to specify different styles to cells in angular UI Grid.

Problem Description:

When user tries to apply custom styling to cellClass the changes won’t get applied to UIGrid.

An important point to be noted is by design uigrid have its own css styles. These css rules comes from uigrid.css or bootstrap.css. So if a user tries to change the default style of uigrid, we need to make sure that the CSS specificity applied properly.

eg:- User is trying to change the background color of uigrid cell. uigrid already have a default cell background color ( grey / white) . So if user need to make change to background color of cell, we need to make sure that CSS Specificity is applied properly.

Solution:

Let’s have a look at CSS Specificity. When you have two or more css rules pointing to same html element, then browser follows some rules to determine which css rule is more specific and that css rule will get applied to html element. This is called CSS Specificity.

  • ID Selector (#Someword)                              : More Specificity
  • Class/Attribute Selector (.Someword)         : Less Specificity than the ID selector.
  • html Selector (all)                                           : Less Specificity than the class selector.

If you notice above list ID selector has more priority, however we can assign priority to css selector by using !important attribute.if a css value is appended with !important, it overrides all other CSS specificity and precedence will be given to the css value with !important.

Hence in order to resolve the issue user need to make sure that user defined style sheet should have more specific css rule than the default rules from uigrid.css / bootstrap.css.

For ex: below user defined css rule will not work

.cellColorChange{
      background-color : 'red' ;
}

Reason is default css from ui-grd.css have more specificity. So this will take priority.

.ui-grid-row:nth-child(odd) .ui-grid-cell{
background-color: #fdfdfd;
}
.ui-grid-row:nth-child(even) .ui-grid-cell{
background-color: #f3f3f3;
}

We need to provide more specificity in user defined CSS. I have used (!important ) along with css property. It works perfectly fine

.cellColorChange{
    background-color : 'red'  !important;
}

 

 

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Finding Textbox control based on a selected row in Jquery

Introduction

In this article I will demonstrate the steps to find the Textbox control from the selected row in repeater using Jquery.

Implementation

We use a Radiobuttonlist to select each rows. Requirement is to disable and enable the  textbox based on the selected radiobutton value for particular row. If user selected Yes then enable the textbox and if user selected No then enable textbox. You can use the below Jquery code to find the selected repeater row and then disable and enable textbox control based on selected value.

Jquery Code

Complete Code

Demo

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You can find complete source code here

 

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Insert functionality in UIGrid

Introduction

This is a continuation of my previous articles in which I demonstrated the procedure to

In this article I will demonstrate how to implement Add new record functionality in Angular UIGrid.

Prerequisites:

I have used icons from FontAwesome Library, which is a great source for multiple icons. You can download Fontawesome icons from here.

To display message after every operation we used UIBootstrap.

Implementation:

You would already have the Model configured by following my previous article on loading UIGrid with data. We will directly look into the details of Adding new record in UIGrid.

You can see a sample Demo of entire functionality below.

demo

UIGrid Updates

We will add a new button on page which responds to click event and open a modal pop up window. Users can enter the details and on save button click we will save the data to database.

AddCustomer function:

AddCustomer function will take the scope object as input which contains all values as provided by user and then save the data to database. User will also see an alert stating the status of insert operation.

Updated Angular code with Insert new Record functionality

Modal Pop up HTML

WEBAPI AddCustomer Method

You can find complete source code of this demo from github

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How to read config settings in Asp.Net Core

Introduction

In this article I will explain the details of how to read config settings in Asp.Net Core.

Description

In Asp.Net webforms we used web.config file to store the config values like a connection string, appsettings etc.However, in Asp.Net core, the config file doesn’t exist anymore.  Instead, we have a slightly different approach where the configuration API provides a way of configuring an app based on a list of name-value pairs that can be read at runtime from multiple sources. You can read the config values from multiple sources like JSON, XML etc.

In this article we will examine how to implement config files based on JSON formats in Asp.Net Core application.

Add the Required references

To read the values from appsettings.json, we need to add the below references to project

Add appsettings.json file to store config values

We will store the config items as Name:Value pair in this json file.  You can also add hierarchical list in json file where each items will be separated by comma.

Sample value

Create ConfigurationBuilder in Startup.cs class

We use AddJsonFile” method in JsonConfigurationExtensions class to provide the Json File path. To reload the configuration file if the file changes we can set the reloadOnChange property.  You can find details of AddJsonFile method here.

Read the value from appsetttings.json file

Using the GetSection method we can access the values from appsettings.json file

Complete Code

You can find the complete source code for this article here

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Implementing delete functionality in UIGrid

Introduction

This is continuation to my previous two articles in which I demonstrated the steps to

In this article I am going to demonstrate how to implement row delete functionality in UIGrid.  The series will contain continuation articles to cover the topic in detail.

Prerequisites:

I have used icons from FontAwesome Library, which is a great source for  icons. You can download Fontawesome icons from here.

Also to display message after every operation we used UIBootstrap

Implementation:

You would already have the Model configured by following my previous article on loading UIGrid with data. We will directly look into the details of deleting records in UIGrid.

Sample Demo of Delete functionality is given below

Demo

UIGrid Updates:

We will update cellTemplate in “Actions” column to add Delete button. We will reuse the editRow flag to hide and display delete buttons.  To delete the record,, we call deleteRow function from Delete button

Delete function:

Delete function will take the selected row object as input parameter; we will find the rowindex using input parameter. Using row index we will find CustomerID of selected row and delete the record. Additionally before deleting the record we will ask for user confirmation. Finally we will call the DeleteCustomer method in Factory service to delete the record in database.

Updated Angular code with Delete functionality

HTML

Delete Customer Method(WEBAPI)

 

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How to implement row edit functionality in Angular UIGrid

Introduction

In this article I will explain the procedures to implement row level editing functionality in Angular UIGrid. This is a continuation of my previous article in which I showed the procedures to populate a UIGrid.

Prerequisites:

I have used icons from FontAwesome Library, which is a great source for  icons. You can download Fontawesome icons from here.

Also to display message after every operation we used UIBootstrap

Implementation:

You would already have the Model configured by following my previous article on loading UIGrid with data. We will directly look into the details of Editing in UIGrid.

UIGrid by design supports the inline edit functionality by double clicking on a particular cell. In this article we will implement editing all columns in a row using button click and save the details to database on Save Button click.

You can see a sample demo of editing functionality below

Demo

UIGrid Updates

We will use the cellTempalate, to make the cell editable. We are using a flag to make the row editable. When user click on the Edit button, we will set the EditRow flag as true. Later in the UIGrid, we check if the flag has been set to true or false. Based on the flag value the row will be editable or readonly.

We will update cellTemplate in “Actions” column to add Edit, Update, Cancel button. We will reuse the editRow flag to hide and display Edit and update buttons.  Also we call edit, saveRow, CancelEdit functions from Edit, Update and Cancel buttons respectively.

Edit function:

Edit function will take the selected row object as input parameter, we will find the rowindex using input parameter and set the editRow flag for selected row to true. This will make the UIGrid row editable.

cancelEdit function:

cancelEdit function will take the selected row object as input parameter, we will find the rowindex using input parameter and set the editRow flag for selected row to false. This will make the UIGrid row read only.

saveRow function:

saveRow function will take the selected row object as input parameter, we will find the rowindex using input parameter and set the editRow flag for selected row to false. This will make the UIGrid row read only.  Next line of code will read the values from edited row and assign it to customer class in scope. Finally we will call the SaveCustomer method in Factory service to update the record in database.

Updated Angular JS Script:

HTML

UpdateCustomer Method(WebAPI)

 

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