Let's talk about the instance usage of create operation

This article mainly introduces the method of C# to determine whether a folder exists and create a folder. It involves C#'s skills related to the judgment and creation of files and directories. Friends in need can refer to the examples in this article to describe the C# implementation. A method to determine whether a folder exists and create it. Share it with everyone for your reference, the details are as follows: protected void Button1_Click(object sender, EventArgs e) { if (Directory.Exists(Server.MapPath("~/upimg/hufu")) == false)//Create the file folder if it does not exist { Directory.CreateDirectory(Server.

1. C# Sample code to determine whether a folder exists and create it

Introduction: This article mainly introduces the method of C# to determine whether a folder exists and create a folder, involving C#'s judgment and creation operations related to files and directories. For tips, friends who need them can refer to

##2. Detailed introduction to RxJava_03 [observer creation operation] in simple terms

##Introduction: The following functions are used to create Observables. We can create corresponding functions as needed.

##3. jQuery+json implements the method of dynamically creating complex tables

Introduction: This article mainly introduces the method of jQuery+json to dynamically create complex tables, involving jQuery's techniques for parsing json data and dynamic table creation operations. Friends in need can refer to the following

4. About the onCreate(SQLiteDatabase db) method call of SQLiteOpenHelper

Introduction: Description: The first time getWritableDatabase or getReadableDatabase is called in android to execute OnCreate() Method, perform a create operation when the table does not exist in the database Suggestions: It is recommended to add the judgment statement CREATE TABLE IF NOT EXISTS in sql when creating the table "Problem description: 1. The relevant table in the database has been created 2. ## has been added to the table #

The above is the detailed content of Let's talk about the instance usage of create operation. For more information, please follow other related articles on the PHP Chinese website!