jquery datagrid modification

With the increase in web applications, the use of visual data presentation has become an important part of modern websites. Therefore, data tables in modern websites play a vital role in their user interaction and data presentation functions. In order to better realize the display and interaction of data tables, jQuery Datagrid was developed.

jQuery Datagrid is a jQuery-based plug-in that uses HTML and CSS to build data tables and JavaScript to control its display and interaction. It provides a lot of functions that can help developers quickly build powerful data tables, such as filtering, sorting, paging, column hiding, etc.

However, in real development, the use of jQuery Datagrid is not only limited to data display, but also requires modification of data in actual use. In this article, we will discuss how to use jQuery Datagrid to implement data modification.

1. Basic Principle

Usually the method of implementing Datagrid modification can be divided into the following steps:

1.1 Receive user events

Each row in a data table has a set of data, and the key to achieving data modification lies in how to obtain the user's operations on the data rows. At this time, you need to trigger corresponding events by monitoring user operations, such as clicks, mouse movements, and other events.

In jQuery, you can listen to user input and respond through standard JavaScript events. For example, we can listen to the click event of the table element

and trigger the event response when the user clicks on the cell.

1.2 Displaying data rows

How to correctly display the selected data rows in Datagrid is an important issue. Before implementing data modification, you need to ensure that the selected rows are displayed correctly on the table.

Through the API methods provided by jQuery Datagrid, you can quickly locate a row of the table and display data in a specific cell. For example, the row numbers can be displayed in table data through the rownumbers parameter. Execute the following code in Datagrid:

datagrid({

rownumbers: true

});

1.3 Data modification

The most critical part is how to implement data modification. When the user manually clicks to select a row of data in the table, the editor needs to be opened on that row. We can use the editor API method provided by jQuery Datagrid to enable the editor in the table. For example, through the editor's start editing (startEdit) and end editing (endEdit) API methods:

var editors = $('#dg').datagrid('getEditors', index);
var fildName = "name";
if (editors && editors.length > 0) {

 editors[0].target.bind('keyup', function (event) {
     onKeyup(this.event, fildName)
 });

}

Among them, getEditors is the method used to get all the editors in a row .

1.4 Data Saving

Once the user modifies the data, the results need to be saved to the backend server for persistence. For important data operations, it is especially necessary to ensure the accuracy of data storage.

The modified data needs to be sent to the server in some way to save the modified data. Normally, we can simply submit the modified data to the server as a POST request parameter. For example, use jQuery Ajax request interface in Datagrid to receive new data Object:

$(function(){
$(document).on('click', '#new', function(){

var data = {
  name: $("#name").val(),
};

$.ajax({
  type: "POST",
  url: "/add",  
  data: data,
  success: function(){
    $("#dg").datagrid("reload");
  }
});

});
});

2. Notes

When using jQuery Datagrid to modify data, you need to pay attention to the following Matters:

2.1 Data Verification

When the user modifies the data and clicks save, it is necessary to ensure that the data passed to the back-end server is valid and meets the requirements.

In jQuery Datagrid, data verification is completed by defining a verification function. This function needs to return true or false to indicate whether the verification passes.

For example, before submitting data, you need to determine whether the user name and password meet the specified parameters of the server:

function checkUserValues(rowIndex, changes) {

var userName = changes.userName;
var password = changes.password;

if (userName.length < 3) {
    alert('用户名称至少包含3个字符');
    return false;
}
if (password.length < 6) {
    alert('密码至少包含6个字符');
    return false;
}
return true;

}

2.2 Plug-in version

When using jQuery Datagrid to modify data, you need to use the latest plug-in version. New versions usually fix some known problems and are more stable when using new versions.

2.3 Mobile terminal adaptation

There may be some problems with the display effect of jQuery Datagrid on the mobile terminal. Therefore, when modifying data, separate adaptation processing is required for the mobile terminal to ensure a good user experience.

3. Summary

In modern web applications, data tables play a vital role in their user interaction and data presentation functions. jQuery Datagrid is a good tool to help developers quickly build powerful data tables. In this article, we discussed how to use jQuery Datagrid to implement data modification, and also talked about some issues and techniques that need to be paid attention to when implementing data modification. I hope this article will be helpful for you to learn and use jQuery Datagrid.

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