![]() R&D provides encryption and decryption lib Solution: Use a general decryption algorithm to decrypt the data after obtaining the encrypted response information. Scenario: Learn about common encryption algorithms used for data, such as base64. #Treeview winforms how to#In this article, we have discussed how to populate a treeview dynamically in a C# application and display the entire path to the node on an event.Encryption is a technology that restricts access to data transmitted over a network.The process of restoring the ciphertext to the original plaintext is called decryption, which is the reverse of encryption.Using encryption and decryption technology in interface development can prevent confidential data from being leaked or tampered with.In the process of interface automation testing, if you want to verify the correctness of the encrypted interface response value, you must use the correct decryption method to decrypt it first, and then complete the verification. Private void treeView1_DoubleClick(object sender, EventArgs e) Private void PopulateTreeView(int parentId, TreeNode parentNode) Private void FrmTreeView_Load(object sender, EventArgs e) When you double-click a node on the Treeview control a message is displayed with the fullpath to the node. #Treeview winforms code#PopulateTreeView(Convert.ToInt32(dr.ToString()), childNode) īuild and run the program that results in the output shown in the following:Īdd the following piece of code to the treeview Double-Click Event: private void treeView1_DoubleClick(object sender, EventArgs e) SqlDataAdapter dachildmnuc = new SqlDataAdapter(Seqchildc, conn) ĬhildNode = (dr.ToString()) ĬhildNode = (dr.ToString()) String Seqchildc = "SELECT MENUPARVAL,FRM_NAME,MNUSUBMENU FROM MNUSUBMENU WHERE MENUPARVAL=" + parentId + "" The Treeview is populated with its child nodes using the PopulateTreeView Method we have defined as in the following: private void PopulateTreeView(int parentId, TreeNode parentNode) PopulateTreeView(Convert.ToInt32(dr.ToString()), parentNode) SqlDataAdapter da = new SqlDataAdapter(Sequel, conn) String Sequel = "SELECT MAINMNU,MENUPARVAL,STATUS FROM MNUPARENT" In the form's Load Event paste the following code: String connectionString ĬonnectionString = Ĭonn = new SqlConnection(connectionString) To access the connection string from code add a reference to System.Configuration and add the namespace using System.Configuration. Paste the code below into the App.config File: To configure the connection settings of the Data Source add an application configuration File Set the form's Name Property to FrmTreeView and its Text Property to Populate TreeView.Īdd a tree view control to the form and set its dock property to Left ![]() Now let us start a new project and populate the TreeView.Ĭreate a new project and name it LoadTreeView. Standards',40,'Y')Īlternatively, you can have a single table to maintain this data of parent and child nodes. INSERT INTO MNUSUBMENU(MENUPARVAL,FRM_NAME,MNUSUBMENU,STATUS) VALUES(30,'Acc. INSERT INTO MNUSUBMENU(MENUPARVAL,FRM_NAME,MNUSUBMENU,STATUS) VALUES(20,'Audit',30,'Y') ![]() INSERT INTO MNUSUBMENU(MENUPARVAL,FRM_NAME,MNUSUBMENU,STATUS) VALUES(1,'Accounting',20,'Y') ![]() Sample Insert Statements INSERT INTO MNUSUBMENU(MENUPARVAL,FRM_NAME,MNUSUBMENU,STATUS) VALUES(1,'Child Finance',10,'Y') (20) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL, (50) COLLATE SQL_Latin1_General_CP1_CI_AS NULL, INSERT INTO MNUPARENT(MAINMNU, STATUS, MENUPARVAL) VALUES('Inventory','Y',2)Ĭhild Nodes CREATE TABLE. INSERT INTO MNUPARENT(MAINMNU, STATUS, MENUPARVAL) VALUES('Finanace','Y',1) Insert Sample Hierarchical Data SET IDENTITY_INSERT MNUPARENT ON )WITH (PAD_INDEX = OFF, IGNORE_DUP_KEY = OFF) ON IDENTITY(1,1) NOT NULL,ĬONSTRAINT PRIMARY KEY CLUSTERED (1) COLLATE SQL_Latin1_General_CP1_CI_AS NULL, (20) COLLATE SQL_Latin1_General_CP1_CI_AS NULL, #Treeview winforms plus#The user can expand a root node by clicking the plus sign (+) button. The root nodes (also known as parent nodes) can have nodes that can be viewed when they are expanded. The top level nodes in a TreeView is called the Root nodes. A TreeView control provides a way to display information in a hierarchical structure using nodes. ![]()
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