创建dBase数据库时如何指定数字宽度和精度?
我们需要能够创建一个 dBase 数据库(.dbf 文件),其中包含具有特定宽度和精度的数字列。我似乎可以设置精度但不能设置宽度。以下代码显示了我的连接字符串和命令文本。
using (OleDbConnection oConnection = new OleDbConnection(String.Format("Provider=Microsoft.Jet.OLEDB.4.0;Data Source = {0};Extended Properties=dBase 5.0", msPath)))
{
....
oCommand.CommandText = "CREATE TABLE [Field] ([Id] Numeric (15, 3))";
oCommand.ExecuteNonQuery();
}
这在文件中提供了一个 Id,20,3
列。
一定有一种方法可以设置字段宽度,而无需手动编辑 .dbf 文件吗?在创建 shapefile 时没有其他人遇到过这个吗?
We need to be able to create a dBase database (.dbf file) containing numeric columns with specific width and precision. I seem to be able to set the precision but not the width. The following code shows my connection string and my command text.
using (OleDbConnection oConnection = new OleDbConnection(String.Format("Provider=Microsoft.Jet.OLEDB.4.0;Data Source = {0};Extended Properties=dBase 5.0", msPath)))
{
....
oCommand.CommandText = "CREATE TABLE [Field] ([Id] Numeric (15, 3))";
oCommand.ExecuteNonQuery();
}
This gives me a column Id,20,3
in the file.
There must be a way to set the field width without resorting to editing the .dbf file manually? Has nobody else come across this before when creating shapefiles?
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找不到解决方案,如果有人能想出一个解决方案,我将更改我接受的答案!
No solution could be found, if anyone can come up with one I will change my accepted answer!
您可以使用 Microsoft OLE DB Provider
使用以下连接:
并且您查询:
You can use Microsoft OLE DB Provider
Use the following conection:
and you query: