.net通过类连接数据库并实现gridview绑定数据源_使用代码连接数据库,填充数据表datatable,再为gridview控件绑定数据源-优快云博客

本文链接：https://blog.youkuaiyun.com/xtm_rongbing/article/details/14056277

本文介绍了一个使用 C# 进行 SQL 数据库连接及数据读取的基本示例，包括连接字符串设置、异常处理及 GridView 绑定等关键步骤。

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data;
using System.Data.SqlClient;

/// <summary>
/// Summary description for dbClass
/// </summary>
public class dbClass
{
    String connectionString = "Data Source=127.0.0.1;Initial Catalog=TestDb;Persist Security Info=True;User ID=Test1;Password=123456";
    SqlConnection conn = null;
    SqlCommand myCommand = null;
    DataSet ds = null;

    public dbClass()
{
}
    //连接数据库
    public string conDb()
    {
        conn = new SqlConnection(connectionString);
        myCommand = conn.CreateCommand();
        try
        {
            conn.Open();
        }
        catch (SqlException e)
        {
            throw new Exception(e.Message);
        }
        return "OK";
    }

    public DataSet gvBind(string strSQL) {
        try
        {
            SqlDataAdapter da = new SqlDataAdapter(strSQL,connectionString);
            ds = new DataSet();
            da.Fill(ds);
        }
        catch (SqlException e)
        {
            throw new Exception(e.Message);
        }

return ds;
}
}

protected void Page_Load(object sender, EventArgs e)
{

        string strSQL = "select * from testtable1";
        dbClass dbc = new dbClass();
        if (dbc.conDb().Equals("OK"))
        {
            GridView2.DataSource = dbc.gvBind(strSQL);
            GridView2.DataBind();

}
}