再通过给定义的文件路径及格式，打印。
版本：9.4
代码如下：
if (!File.Exists(filepath))
{
MessageBox.Show("打印文件不存在！", "警告", MessageBoxButtons.OK);
return;
}
string connstr = "";
try
{
engine = new Engine();
engine.Start();
LabelFormatDocument btFormat = engine.Documents.Open(FormPath);
btFormat.PrintSetup.PrinterName = printName;
// Assign number of identical copies if it is not datasourced.
if (!(printCopies >= 1))
MessageBox.Show("Warning", "Copies must be an integer greater than or equal
to 1.", MessageBoxButtons.OK);
else
btFormat.PrintSetup.IdenticalCopiesOfLabel = printCopies;
//连接txt文件作为数据库
TextFile textFileDB = new TextFile("TextfileDatabase");
textFileDB.FileName = filepath;
btFormat.DatabaseConnections.SetDatabaseConnection(textFileDB);
//取文件名作为数据库域名称
string filename = print_set_header.Rows[0]["FORMAT_NAME"].ToString() ;
filename = filename.Replace(".btw", "");
//根据标签Substring取值类型赋值
for (int i = 0; i < print_set_detail.Rows.Count; i++)
{
//指定文字
if ("T".Equals(print_set_detail.Rows[i]["TYPE"].ToString(),
StringComparison.CurrentCultureIgnoreCase))
{
btFormat.SubStrings[print_set_detail.Rows[i]["VARIABLE"].ToString
()].Value = print_set_detail.Rows[i]["COL"].ToString();
}
else
//数据库字段
{
btFormat.SubStrings[print_set_detail.Rows[i]["VARIABLE"].ToString
()].Value = filename +"."+ Convert.ToInt32(print_set_detail.Rows[i]["COL"]).ToString();
}
}
btFormat.Print();
btFormat.Close(SaveOptions.DoNotSaveChanges);
engine.Stop();
engine.Dispose();
}
catch (PrintEngineException exception)
{
// If the engine is unable to start, a PrintEngineException will be thrown.
MessageBox.Show("Warning", exception.Message, MessageBoxButtons.OK);
//this.Close(); // Close this app. We cannot run without connection to an engine.
return;
}
在以下代码处报错：
btFormat.DatabaseConnections.SetDatabaseConnection(textFileDB);
错误提示为：
A database with the name "TextfileDatabase" does not exist.
