数据类型表：
| TypeName | ProviderDbType | ColumnSize | CreateFormat | CreateParameters | DataType |
| BFILE | 1 | 4294967296 | BFILE | System.Byte[] | |
| BLOB | 2 | 4294967296 | BLOB | System.Byte[] | |
| CHAR | 3 | 2000 | CHAR({0}) | size | System.String |
| CLOB | 4 | 4294967296 | CLOB | System.String | |
| DATE | 6 | 19 | DATE | System.DateTime | |
| FLOAT | 29 | 38 | FLOAT | System.Decimal | |
| INTERVAL DAY TO SECOND | 7 | 0 | INTERVAL DAY({0}) TO SECOND({1}) | dayprecision,secondsprecision | System.TimeSpan |
| INTERVAL YEAR TO MONTH | 8 | 0 | INTERVAL YEAR({0}) TO MONTH | yearprecision | System.Int32 |
| LONG | 10 | 2147483647 | LONG | System.String | |
| LONG RAW | 9 | 2147483647 | LONG RAW | System.Byte[] | |
| NCHAR | 11 | 2000 | NCHAR({0}) | size | System.String |
| NCLOB | 12 | 4294967296 | NCLOB | System.String | |
| NUMBER | 13 | 38 | NUMBER ({0},{1}) | precision,scale | System.Decimal |
| NVARCHAR2 | 14 | 4000 | NVARCHAR2({0}) | size | System.String |
| RAW | 15 | 2000 | RAW({0}) | size | System.Byte[] |
| ROWID | 16 | 3950 | ROWID | System.String | |
| TIMESTAMP | 18 | 27 | TIMESTAMP({0}) | precision of fractional seconds | System.DateTime |
| TIMESTAMP WITH LOCAL TIME ZONE | 19 | 27 | TIMESTAMP({0} WITH LOCAL TIME ZONE) | precision of fractional seconds | System.DateTime |
| TIMESTAMP WITH TIME ZONE | 20 | 34 | TIMESTAMP({0} WITH TIME ZONE) | precision of fractional seconds | System.DateTime |
| VARCHAR2 | 22 | 4000 | VARCHAR2({0}) | size | System.String |
/// <summary>
/// 对于本文的Oracle安装来说，data source对应着Oracle_Client\oracle\ora92\network\admin\tnsnames.ora配置文件中的网络服务名
/// Data Source=(DESCRIPTION = (ADDRESS_LIST= (ADDRESS = (PROTOCOL = TCP)(HOST = geovin)(PORT = 1521))) (CONNECT_DATA = (SERVICE_NAME = geovindu)));user id=sysdba;password=0214;Persist Security Info=True;";
/// 涂聚文 20150516
/// </summary>
public partial class Form1 : Form
{
public string connectionString = @"Data Source=(DESCRIPTION = (ADDRESS_LIST= (ADDRESS = (PROTOCOL = TCP)(HOST = geovistu-xwvuyh)(PORT = 1521))) (CONNECT_DATA = (SERVICE_NAME = oracle9i)));user id=geovin;password=0214;Persist Security Info=True;";
/// <summary>
///
/// </summary>
/// <returns></returns>
DataTable setDatat()
{
DataTable dt = new DataTable();
dt.Columns.Add("id", typeof(int));
dt.Columns.Add("name", typeof(string));
dt.Rows.Add(1, "Procedures");
dt.Rows.Add(2, "DataTypes");
dt.Rows.Add(3, "Foreign Keys");
dt.Rows.Add(4, "Databases");
dt.Rows.Add(5, "dbo");
dt.Rows.Add(6, "Arguments");
dt.Rows.Add(7, "Collection Name");
dt.Rows.Add(8, "DatasourceInformation");
dt.Rows.Add(9, "MetaDataCollections");
dt.Rows.Add(10, "ForeignKeyColumns");
dt.Rows.Add(11, "Functions");
dt.Rows.Add(12, "IndexColumns");
dt.Rows.Add(13, "Indexes");
dt.Rows.Add(14, "PrimaryKeys");
dt.Rows.Add(15, "ReservedWords");
dt.Rows.Add(16, "Restrictions");
dt.Rows.Add(17, "Triggers");
dt.Rows.Add(18, "UDFs");
dt.Rows.Add(19, "UniqueKeys");
dt.Rows.Add(20, "UserPrivileges");
dt.Rows.Add(21, "Users");
dt.Rows.Add(22, "ViewColumns");
//DataTable dt = connection.GetSchema("Tables", strRestricted);
dt.Rows.Add(23, "Tables");
dt.Rows.Add(24, "Columns");//表的列的详细，有主键TABLE_CATALOG,TABLE_SCHEMA,TABLE_NAME,COLUMN_NAME,ORDINAL_POSITION,COLUMN_DEFAULT,IS_NULLABLE,DATA_TYPE,CHARACTER_MAXIMUM_LENGTH,NUMERIC_PRECISION,NUMERIC_SCALE,DATETIME_PRECISION,CHARACTER_SET_NAME,COLLATION_NAME,COLUMN_TYPE,COLUMN_KEY,EXTRA,PRIVILEGES,COLUMN_COMMENT
dt.Rows.Add(25, "Views");
dt.Rows.Add(26, "Indexes");//表的列
dt.Rows.Add(27, "IndexColumns");//主键
return dt;
}
/// <summary>
///
/// </summary>
public Form1()
{
InitializeComponent();
}
/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Form1_Load(object sender, EventArgs e)
{
this.txtConnection.Text = connectionString;
this.comboBox1.DataSource = setDatat();
this.comboBox1.DisplayMember = "name";
this.comboBox1.ValueMember = "id";
}
/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void button1_Click(object sender, EventArgs e)
{
try
{
using (OracleConnection connection = new OracleConnection(connectionString))
{
connection.Open();
//MessageBox.Show(connection.State.ToString());
DataTable dt = connection.GetSchema(this.comboBox1.Text.Trim());
this.dataGridView1.DataSource = dt;
this.textBox1.Text = GetColumnNames(dt);
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message.ToString());
ex.Message.ToString();
}
}
/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void button2_Click(object sender, EventArgs e)
{
string connString = "Provider=OraOLEDB.Oracle.1;User ID=geovin;Password=0214;Data Source=(DESCRIPTION = (ADDRESS_LIST= (ADDRESS = (PROTOCOL = TCP)(HOST = geovistu-xwvuyh)(PORT = 1521))) (CONNECT_DATA = (SERVICE_NAME = oracle9i)))";
OleDbConnection conn = new OleDbConnection(connString);
try
{
conn.Open();
//MessageBox.Show(conn.State.ToString());
DataTable dt = conn.GetSchema(this.comboBox1.Text.Trim());
this.dataGridView1.DataSource = dt;
this.textBox1.Text = GetColumnNames(dt);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message.ToString());
}
finally
{
conn.Close();
}
}
