读者朋友：
    您好，把数据库连接信息写在INI文件中，然后动态链接，可以参考下面代码：
ConnectionInfo connectionInfo = new ConnectionInfo();
connectionInfo.ServerName = ConfigurationManager.AppSettings["ServerName"];
connectionInfo.DatabaseName = 
ConfigurationManager.AppSettings["DatabaseName                
connectionInfo.UserID = ConfigurationManager.AppSettings["UserID"];
connectionInfo.Password = 
ConfigurationManager.AppSettings["Password"];
Tables tables = reportDocument.Database.Tables;
foreach (CrystalDecisions.CrystalReports.Engine.Table 
table in tables)
{
        TableLogOnInfo tableLogonInfo = table.LogOnInfo;
        tableLogonInfo.ConnectionInfo = connectionInfo;
        table.ApplyLogOnInfo(tableLogonInfo);
}