VB使用数据库数据绘制MSChart折线图

The document "VB调用数据库数据画mschart折线图.doc" provides a step-by-step guide on how to use VB to retrieve data from a database and create a line chart using MSChart. The detailed instructions explain the process through a code example. In the document, the first step is to create a new VB project and add the necessary controls, including a command button and an MSChart control. The code provided demonstrates how to establish a connection to a database using ADO (ActiveX Data Objects). The connection string specifies the data source as a Microsoft Jet OLE DB Provider. After establishing the connection, an SQL query is executed to retrieve the required data from the database. The retrieved data is stored in a recordset object. The code then loops through the recordset to populate the data into the MSChart control. A series of data points are created by iterating through the recordset and adding them to the MSChart control. The X and Y values for each data point are specified, and the line chart is updated in real-time. The document also includes error handling, using the "On Error Resume Next" statement, to suppress any runtime errors that may occur during the execution of the code. Overall, the document provides a comprehensive guide on how to use VB to retrieve data from a database and create a line chart using MSChart. The step-by-step instructions, along with the code example, make it easy for beginners to follow along and implement the solution in their own projects.