SQLite metadata
Collection Name
|
Number of restrictions |
Remarks
|
---|---|---|
Catalogs |
1
|
Lists all connected catalogs.
When restricted by name mask, returns all catalogs that match the mask.
|
Columns |
3
|
Returns list of columns, their type and some extra information.
|
DatasourceInformation |
0
|
Returns information about the data source.
|
DataTypes |
0
|
Returns information about data types supported by the data source.
|
ForeignKeyColumns |
3
|
Returns list of columns used by foreign keys in the catalog.
Restrict it with catalog name, table name, and the foreign key name pattern.
|
ForeignKeys |
3
|
Returns list of columns that participate in foreign keys.
|
IndexColumns |
4
|
Returns list of indexed columns in the catalog, their type and some extra information.
Restrict it with catalog name, table name, index name pattern, and column name pattern.
|
Indexes |
3
|
Returns list of indexes and their details.
|
MetaDataCollections |
0
|
Returns this list. Same as using GetSchema() method without parameters.
|
PrimaryKeys |
2
|
Returns list of columns that participate in primary keys.
|
ReservedWords |
0
|
Lists all reserved words used in the server.
|
Restrictions |
0
|
Returns list of possible restrictions and their default values for the metadata collections.
|
Tables |
2
|
GetSchema("Tables") returns list of tables in "main" catalog.
|
UniqueKeys |
2
|
|
ViewColumns |
3
|
Returns list of columns used by views in the catalog.
Restrict it with catalog name, table name and column name.
|
Views |
2
|
GetSchema("Views") returns list of views in "main" catalog.
|
csharp代码示例:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SQLite;
using System.Data.SQLite.Linq;
/*
* 参考资源 塗聚文 Geovin Du Access,DB2,Informix,MySql,Oracle,PostgreSQL,SqlCe,SQLite,SqlServer,Sybase,Firebird
http://zetcode.com/db/sqlitecsharp/meta/
* http://sourceforge.net/projects/sqlitemetadata/files/?source=navbar
* http://www.codeproject.com/Tips/810596/Csharp-VB-NET-Cplusplus-CLI-Create-read-and-write
* https://dbschemareader.codeplex.com/
* https://github.com/sqlitebrowser/sqlitebrowser/releases/tag/v3.5.1
* http://stackoverflow.com/questions/15207045/determining-primary-key-columns-via-getschema
* http://www.devart.com/dotconnect/sqlite/docs/MetaData.html
* http://www.devart.com/dotconnect/mysql/docs/MetaData.html
* http://www.devart.com/dotconnect/sqlserver/docs/MetaData.html
* http://www.devart.com/dotconnect/db2/docs/MetaData.html
* http://www.devart.com/dotconnect/sqlite/docs/MetaData.html
* http://www.devart.com/dotconnect/oracle/articles/metadata.html
* http://www.devart.com/dotconnect/postgresql/docs/MetaData.html
* SQL Server Schema Collections
* https://msdn.microsoft.com/en-us/library/ms254969.aspx
* https://msdn.microsoft.com/en-us/library/kcax58fh.aspx
* https://support.microsoft.com/en-us/kb/318452 Excel MetaData
* CollectionName # Name
Columns 1 TABLE_CATALOG
Columns 2 TABLE_SCHEMA
Columns 3 TABLE_NAME
Columns 4 COLUMN_NAME
Indexes 1 TABLE_CATALOG
Indexes 2 TABLE_SCHEMA
Indexes 3 INDEX_NAME
Indexes 4 TYPE
Indexes 5 TABLE_NAME
Procedures 1 PROCEDURE_CATALOG
Procedures 2 PROCEDURE_SCHEMA
Procedures 3 PROCEDURE_NAME
Procedures 4 PROCEDURE_TYPE
Tables 1 TABLE_CATALOG
Tables 2 TABLE_SCHEMA
Tables 3 TABLE_NAME
Tables 4 TABLE_TYPE
Views 1 TABLE_CATALOG
Views 2 TABLE_SCHEMA
Views 3 TABLE_NAME
*
*
* MetaDataCollections集合下有:
DataSourceInformation
DataTypes
ReservedWords
Catalogs
Columns
Indexes
IndexColumns
Tables
Views
ViewColumns
ForeignKeys
Triggers
*
*
*/ namespace PayrollPrint
{
/// <summary>
/// SELECT name, sql FROM sqlite_master WHERE type="table" AND name = "Dom"
/// SELECT count(*) FROM sqlite_master WHERE type = "view" AND name = "myView"
/// 涂聚文 20150324 21:19
/// </summary>
public partial class SQLiteFileForm : Form
{ public string connectionString = "Data Source=geovindu;Version=3;Pooling=true;FailIfMissing=false;UTF8Encoding=True;"; /// <summary>
/// 3.8.5版本查詢
/// </summary>
/// <returns></returns>
private DataTable setTables()
{
DataTable dt = new DataTable();
dt.Columns.Add("id", typeof(int));
dt.Columns.Add("name", typeof(string));
dt.Rows.Add(1, "TABLES");//所有表包括系统表
dt.Rows.Add(2, "Indexes");//所有有主键的表
dt.Rows.Add(3, "IndexColumns");//有键的表及主键
dt.Rows.Add(4, "Views");//所有视图
dt.Rows.Add(5, "DataTypes");//字段类型
dt.Rows.Add(6, "Columns");//表的字段
dt.Rows.Add(7, "Catalogs");//数据库文件地址
dt.Rows.Add(8, "DatasourceInformation");//数据库文件版本等信息
dt.Rows.Add(9, "ForeignKeyColumns");//无效
dt.Rows.Add(10, "ForeignKeys");//外键
dt.Rows.Add(11, "MetaDataCollections");//MetaData集合
dt.Rows.Add(12, "PrimaryKeys");
dt.Rows.Add(13, "ReservedWords");
dt.Rows.Add(14, "Restrictions");
dt.Rows.Add(15, "UniqueKeys");
dt.Rows.Add(16, "ViewColumns");//视图的字段
dt.Rows.Add(17, "Triggers");
return dt;
} /// <summary>
///
/// </summary>
public SQLiteFileForm()
{
InitializeComponent();
}
/// <summary>
/// select * from sqlite_master where type = 'table' and name ='myTable';
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void SQLiteFileForm_Load(object sender, EventArgs e)
{
this.comboBox1.DataSource = setTables();
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)
{
openFileDialog1.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);
//JPEG Files (*.jpeg)|*.jpeg|PNG Files (*.png)|*.png|JPG Files (*.jpg)|*.jpg|GIF Files (*.gif)|*.gif
openFileDialog1.FileName = "";
openFileDialog1.Filter = "files(*.db)|*.db|files (*.*)|*.*";//|(*.xlsx)|*.xlsx Image Files(*.BMP;*.JPG;*.GIF)|*.BMP;*.JPG;*.GIF|All files (*.*)|*.* txt files (*.txt)|*.txt|All files (*.*)|*.*"
openFileDialog1.FilterIndex = 2;
openFileDialog1.RestoreDirectory = true;
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
if (!openFileDialog1.FileName.Equals(String.Empty))
{
connectionString = @"Data Source=" + openFileDialog1.FileName + ";Version=3;Pooling=true;FailIfMissing=false;UTF8Encoding=True;";
this.textBox1.Text = openFileDialog1.FileName;
}
}
}
/// <summary>
/// TABLE_CATALOG,TABLE_SCHEMA,TABLE_NAME,TABLE_TYPE,TABLE_ID,TABLE_ROOTPAGE,TABLE_DEFINITION
/// TABLE_CATALOG,TABLE_SCHEMA,TABLE_NAME,INDEX_CATALOG,INDEX_SCHEMA,INDEX_NAME,PRIMARY_KEY,UNIQUE,CLUSTERED,TYPE,FILL_FACTOR,INITIAL_SIZE,NULLS,SORT_BOOKMARKS,AUTO_UPDATE,NULL_COLLATION,ORDINAL_POSITION,COLUMN_NAME,COLUMN_GUID,COLUMN_PROPID,COLLATION,CARDINALITY,PAGES,FILTER_CONDITION,INTEGRATED,INDEX_DEFINITION ///IndexColumns: CONSTRAINT_CATALOG,CONSTRAINT_SCHEMA,CONSTRAINT_NAME,TABLE_CATALOG,TABLE_SCHEMA,TABLE_NAME,COLUMN_NAME,ORDINAL_POSITION,INDEX_NAME,COLLATION_NAME,SORT_MODE,CONFLICT_OPTION
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void button2_Click(object sender, EventArgs e)
{
DataTable dt = new DataTable();
using (SQLiteConnection conn = new SQLiteConnection(connectionString))
{
conn.Open();
//http://www.devart.com/dotconnect/sqlite/docs/MetaData.html
//Catalogs,Columns,DatasourceInformation,DataTypes,ForeignKeyColumns,ForeignKeys,IndexColumns,Indexes,MetaDataCollections,PrimaryKeys,ReservedWords,Restrictions,Tables,UniqueKeys,ViewColumns,Views DataTable schemaTable = conn.GetSchema(this.comboBox1.Text);//(有键的表及主键)// conn.GetSchema("Indexes");(所有有主键的表)// conn.GetSchema("TABLES");(所有表包括系统表)//Views
dataGridView1.DataSource = schemaTable;
this.textBox2.Text = GetColumnNames(schemaTable);
} }
/// <summary>
///
/// </summary>
/// <param name="table"></param>
/// <returns></returns>
public static string GetColumnNames(System.Data.DataTable table)
{
if (table != null)
{
List<string> lstColumn = new List<string>(); foreach (System.Data.DataColumn col in table.Columns)
{
lstColumn.Add(col.ColumnName);
} return String.Join(",", lstColumn.ToArray());
} return string.Empty;
//foreach (DataRow row in table.Rows)
//{
// foreach (DataColumn column in table.Columns)
// {
// ColumnName = column.ColumnName;
// ColumnData = row[column].ToString();
// }
//}
}
数据库类型
smallint | System.Int16 | 10 |
int | System.Int32 | 11 |
real | System.Double | 8 |
single | System.Single | 15 |
float | System.Double | 8 |
double | System.Double | 8 |
money | System.Decimal | 7 |
currency | System.Decimal | 7 |
decimal | System.Decimal | 7 |
numeric | System.Decimal | 7 |
bit | System.Boolean | 3 |
yesno | System.Boolean | 3 |
logical | System.Boolean | 3 |
bool | System.Boolean | 3 |
boolean | System.Boolean | 3 |
tinyint | System.Byte | 2 |
integer | System.Int64 | 12 |
counter | System.Int64 | 12 |
autoincrement | System.Int64 | 12 |
identity | System.Int64 | 12 |
long | System.Int64 | 12 |
bigint | System.Int64 | 12 |
binary | System.Byte[] | 1 |
varbinary | System.Byte[] | 1 |
blob | System.Byte[] | 1 |
image | System.Byte[] | 1 |
general | System.Byte[] | 1 |
oleobject | System.Byte[] | 1 |
varchar | System.String | 16 |
nvarchar | System.String | 16 |
memo | System.String | 16 |
longtext | System.String | 16 |
note | System.String | 16 |
text | System.String | 16 |
ntext | System.String | 16 |
string | System.String | 16 |
char | System.String | 16 |
nchar | System.String | 16 |
datetime | System.DateTime | 6 |
smalldate | System.DateTime | 6 |
timestamp | System.DateTime | 6 |
date | System.DateTime | 6 |
time | System.DateTime | 6 |
uniqueidentifier | System.Guid | 4 |
guid | System.Guid | 4 |
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SQLite;
using System.Data.SQLite.Linq;
using Aspose.Cells.Tables;
using Aspose.Cells;
using System.Data.OleDb; namespace SQLiteGenerator
{ /// <summary>
/// 涂聚文 塗聚文
/// geovindu Geovin Du
/// </summary>
public partial class ForeignKeysForm : Form
{ public string connectionString = "Data Source=geovindu;Version=3;Pooling=true;FailIfMissing=false;UTF8Encoding=True;";
/// <summary>
/// 3.8.5版本查詢
/// </summary>
/// <returns></returns>
private DataTable setTables()
{
/*
MetaDataCollections
DataSourceInformation
DataTypes
ReservedWords
Catalogs
Columns
Indexes
IndexColumns
Tables
Views
ViewColumns
ForeignKeys
Triggers
*/
DataTable dt = new DataTable();
dt.Columns.Add("id", typeof(int));
dt.Columns.Add("name", typeof(string));
dt.Rows.Add(1, "Tables");//所有表包括系统表
dt.Rows.Add(2, "Indexes");//所有有主键的表
dt.Rows.Add(3, "IndexColumns");//有键的表及主键
dt.Rows.Add(4, "Views");//所有视图
dt.Rows.Add(5, "DataTypes");//字段类型
dt.Rows.Add(6, "Columns");//表的字段
dt.Rows.Add(7, "Catalogs");//数据库文件地址
dt.Rows.Add(8, "DatasourceInformation");//数据库文件版本等信息
//dt.Rows.Add(9, "ForeignKeyColumns");//无效
dt.Rows.Add(9, "ForeignKeys");//外键
dt.Rows.Add(10, "MetaDataCollections");//MetaData集合
//dt.Rows.Add(12, "PrimaryKeys");//无效
dt.Rows.Add(11, "ReservedWords");
//dt.Rows.Add(14, "Restrictions");//无效
// dt.Rows.Add(15, "UniqueKeys");//无效
dt.Rows.Add(12, "ViewColumns");//视图的字段
dt.Rows.Add(19, "Triggers");
return dt;
}
/// <summary>
///
/// </summary>
public ForeignKeysForm()
{
InitializeComponent();
}
/// <summary>
/// /
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ForeignKeysForm_Load(object sender, EventArgs e)
{
try
{
//this.comboBox1.DataSource = setTables();
//this.comboBox1.DisplayMember = "name";
//this.comboBox1.ValueMember = "id";
}
catch (Exception ex)
{
LogHelper.WriteLog(typeof(Program), ex.Message.ToString());
}
}
/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void button1_Click(object sender, EventArgs e)
{ try
{
openFileDialog1.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);
//JPEG Files (*.jpeg)|*.jpeg|PNG Files (*.png)|*.png|JPG Files (*.jpg)|*.jpg|GIF Files (*.gif)|*.gif
openFileDialog1.FileName = "";
openFileDialog1.Filter = "files(*.db)|*.db|files (*.*)|*.*";//|(*.xlsx)|*.xlsx Image Files(*.BMP;*.JPG;*.GIF)|*.BMP;*.JPG;*.GIF|All files (*.*)|*.* txt files (*.txt)|*.txt|All files (*.*)|*.*"
openFileDialog1.FilterIndex = 2;
openFileDialog1.RestoreDirectory = true;
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
if (!openFileDialog1.FileName.Equals(String.Empty))
{
connectionString = @"Data Source=" + openFileDialog1.FileName + ";Version=3;Pooling=true;FailIfMissing=false;UTF8Encoding=True;";
this.textBox1.Text = openFileDialog1.FileName; DataTable dt=getSchema(connectionString);
this.comboBox1.DataSource = dt;
this.comboBox1.DisplayMember = "CollectionName";
this.comboBox1.ValueMember = "id"; }
}
}
catch (Exception ex)
{
LogHelper.WriteLog(typeof(Program), ex.Message.ToString());
}
}
/// <summary>
/// CollectionName,NumberOfRestrictions,NumberOfIdentifierParts
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void button2_Click(object sender, EventArgs e)
{
DataTable dt = new DataTable();
using (SQLiteConnection conn = new SQLiteConnection(connectionString))
{
conn.Open();
//http://www.devart.com/dotconnect/sqlite/docs/MetaData.html
//Catalogs,Columns,DatasourceInformation,DataTypes,ForeignKeyColumns,ForeignKeys,IndexColumns,Indexes,MetaDataCollections,PrimaryKeys,ReservedWords,Restrictions,Tables,UniqueKeys,ViewColumns,Views DataTable schemaTable = conn.GetSchema(this.comboBox1.Text);//(有键的表及主键)//conn.GetSchema();MetaDataCollections // conn.GetSchema("Indexes");(所有有主键的表)// conn.GetSchema("TABLES");(所有表包括系统表)//Views
dataGridView1.DataSource = schemaTable;
this.textBox2.Text = GetColumnNames(schemaTable);
}
}
/// <summary>
/// TABLE_CATALOG,TABLE_SCHEMA,TABLE_NAME,TABLE_TYPE,TABLE_ID,TABLE_ROOTPAGE,TABLE_DEFINITION
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void dataGridView1_CellDoubleClick(object sender, DataGridViewCellEventArgs e)
{
if (this.comboBox1.Text.ToLower() == "tables")
{
if(this.dataGridView1.Rows.Count>0)
{
string tablename = this.dataGridView1.Rows[e.RowIndex].Cells["TABLE_NAME"].Value.ToString();
DataTable pdt = GetForeignKeyParentInfo(tablename, connectionString);
this.dataGridView2.DataSource = pdt;
DataTable cdt = GetForeignChildKeyInfo(tablename, connectionString);
this.dataGridView3.DataSource = cdt; this.dataGridView4.DataSource = GetSQLiteColumnsData(tablename, connectionString); }
}
}
/// <summary>
/// MetaDataCollections
/// </summary>
/// <returns></returns>
DataTable getSchema(string connString)
{
DataTable dt = new DataTable();
dt.Columns.Add("id", typeof(int));
dt.Columns.Add("CollectionName", typeof(string));
dt.Columns.Add("NumberOfRestrictions", typeof(string));
dt.Columns.Add("NumberOfIdentifierParts", typeof(string));
using (SQLiteConnection conn = new SQLiteConnection(connString))
{
conn.Open();
//http://www.devart.com/dotconnect/sqlite/docs/MetaData.html
//Catalogs,Columns,DatasourceInformation,DataTypes,ForeignKeyColumns,ForeignKeys,IndexColumns,Indexes,MetaDataCollections,PrimaryKeys,ReservedWords,Restrictions,Tables,UniqueKeys,ViewColumns,Views DataTable schemaTable = conn.GetSchema("MetaDataCollections");// conn.GetSchema()和conn.GetSchema("MetaDataCollections")效果是一样的
int i = 1;
foreach (DataRow row in schemaTable.Rows)
{
dt.Rows.Add(i,row["CollectionName"], row["NumberOfRestrictions"].ToString(), row["NumberOfIdentifierParts"].ToString());
i++;
} }
return dt;
} /// <summary>
///
/// </summary>
/// <param name="tableName"></param>
/// <returns></returns>
public DataSet GetSQLiteColumns(string tableName, string connectionString)
{ DataTable dtKey = GetPrimaryInfo(tableName, connectionString);//获取主键信息
DataTable result = GetColumnInfo(tableName, connectionString);//获取列信息
DataTable paredntfkey = GetForeignKeyParentInfo(tableName, connectionString);
DataTable childfkey = GetForeignChildKeyInfo(tableName, connectionString);
DataTable dt = new DataTable();
dt.Columns.Add(new DataColumn("tableName", typeof(string)));
dt.Columns.Add(new DataColumn("tableDescription", typeof(string)));
dt.Columns.Add(new DataColumn("colOrder", typeof(string)));
dt.Columns.Add(new DataColumn("columnName", typeof(string)));
dt.Columns.Add(new DataColumn("IsIdentity", typeof(string)));
dt.Columns.Add(new DataColumn("IsPrimaryKey", typeof(bool)));
dt.Columns.Add(new DataColumn("TypeName", typeof(string)));
dt.Columns.Add(new DataColumn("Length", typeof(string)));
dt.Columns.Add(new DataColumn("Precision", typeof(string)));
dt.Columns.Add(new DataColumn("Scale", typeof(string)));
dt.Columns.Add(new DataColumn("Nullable", typeof(string)));
dt.Columns.Add(new DataColumn("DefaultVal", typeof(string)));
dt.Columns.Add(new DataColumn("Description", typeof(string)));
dt.Columns.Add(new DataColumn("IsParentForeignKey", typeof(bool)));//是否存在外键的主表
dt.Columns.Add(new DataColumn("IsChildForeignKey", typeof(bool)));//是否存在外键的从表
foreach (DataRow row in result.Rows)
{
DataRow r = dt.NewRow();
r["tableName"] = row["TABLE_NAME"].ToString();
r["tableDescription"] = row["COLLATION_SCHEMA"].ToString();
r["colOrder"] = row["ORDINAL_POSITION"].ToString();//
r["columnName"] = row["COLUMN_NAME"].ToString();
r["IsIdentity"] = false;//还未找到对应项
r["IsPrimaryKey"] = dtKey.Select(string.Format("COLUMN_NAME='{0}'", row["COLUMN_NAME"].ToString())).Length > 0 ? true : false;//是否是主键
r["TypeName"] = row["DATA_TYPE"].ToString().ToString();// row["DATA_TYPE"].ToString();
r["Length"] = row["CHARACTER_MAXIMUM_LENGTH"].ToString();
r["Precision"] = row["NUMERIC_PRECISION"].ToString();
r["Scale"] = row["NUMERIC_SCALE"].ToString();
r["Nullable"] = bool.Parse(row["IS_NULLABLE"].ToString());
r["DefaultVal"] = row["COLUMN_DEFAULT"].ToString();
r["Description"] = row["DESCRIPTION"].ToString();
r["IsParentForeignKey"] = paredntfkey.Select(string.Format("COLUMN_NAME='{0}'", row["COLUMN_NAME"].ToString())).Length > 0 ? true : false;//是否是主键
r["IsChildForeignKey"] = childfkey.Select(string.Format("COLUMN_NAME='{0}'", row["COLUMN_NAME"].ToString())).Length > 0 ? true : false;//是否是主键
dt.Rows.Add(r);
}
DataSet ds = new DataSet();
ds.Tables.Add(dt);
return ds;
}
/// <summary>
///
/// </summary>
/// <param name="tableName"></param>
/// <param name="connectionString"></param>
/// <returns></returns>
public DataTable GetSQLiteColumnsData(string tableName, string connectionString)
{ DataTable dtKey = GetPrimaryInfo(tableName, connectionString);//获取主键信息
DataTable result = GetColumnInfo(tableName, connectionString);//获取列信息
DataTable paredntfkey = GetForeignKeyParentInfo(tableName, connectionString);
DataTable childfkey = GetForeignChildKeyInfo(tableName, connectionString);
DataTable dt = new DataTable();
dt.Columns.Add(new DataColumn("tableName", typeof(string)));
dt.Columns.Add(new DataColumn("tableDescription", typeof(string)));
dt.Columns.Add(new DataColumn("colOrder", typeof(string)));
dt.Columns.Add(new DataColumn("columnName", typeof(string)));
dt.Columns.Add(new DataColumn("IsIdentity", typeof(string)));
dt.Columns.Add(new DataColumn("IsPrimaryKey", typeof(bool)));
dt.Columns.Add(new DataColumn("TypeName", typeof(string)));
dt.Columns.Add(new DataColumn("Length", typeof(string)));
dt.Columns.Add(new DataColumn("Precision", typeof(string)));
dt.Columns.Add(new DataColumn("Scale", typeof(string)));
dt.Columns.Add(new DataColumn("Nullable", typeof(string)));
dt.Columns.Add(new DataColumn("DefaultVal", typeof(string)));
dt.Columns.Add(new DataColumn("Description", typeof(string)));
dt.Columns.Add(new DataColumn("IsParentForeignKey", typeof(bool)));//是否存在外键的主表
dt.Columns.Add(new DataColumn("IsChildForeignKey", typeof(bool)));//是否存在外键的从表
foreach (DataRow row in result.Rows)
{
DataRow r = dt.NewRow();
r["tableName"] = row["TABLE_NAME"].ToString();
r["tableDescription"] = row["COLLATION_SCHEMA"].ToString();
r["colOrder"] = row["ORDINAL_POSITION"].ToString();//
r["columnName"] = row["COLUMN_NAME"].ToString();
r["IsIdentity"] = false;//还未找到对应项
r["IsPrimaryKey"] = dtKey.Select(string.Format("COLUMN_NAME='{0}'", row["COLUMN_NAME"].ToString())).Length > 0 ? true : false;//是否是主键
r["TypeName"] = row["DATA_TYPE"].ToString().ToString();// row["DATA_TYPE"].ToString();
r["Length"] = row["CHARACTER_MAXIMUM_LENGTH"].ToString();
r["Precision"] = row["NUMERIC_PRECISION"].ToString();
r["Scale"] = row["NUMERIC_SCALE"].ToString();
r["Nullable"] = bool.Parse(row["IS_NULLABLE"].ToString());
r["DefaultVal"] = row["COLUMN_DEFAULT"].ToString();
r["Description"] = row["DESCRIPTION"].ToString();
r["IsParentForeignKey"] = GetForeignKeyParentInfo(tableName, row["COLUMN_NAME"].ToString(),connectionString).Rows.Count > 0 ? true : false;//是否是主表的主键为外键
r["IsChildForeignKey"] = GetForeignChildKeyInfo(tableName, row["COLUMN_NAME"].ToString(), connectionString).Rows.Count > 0 ? true : false;//是否是子表的外主键
dt.Rows.Add(r);
}
return dt;
}
/// <summary>
///
/// </summary>
/// <param name="table"></param>
/// <returns></returns>
public static string GetColumnNames(System.Data.DataTable table)
{
if (table != null)
{
List<string> lstColumn = new List<string>(); foreach (System.Data.DataColumn col in table.Columns)
{
lstColumn.Add(col.ColumnName);
} return String.Join(",", lstColumn.ToArray());
} return string.Empty;
//foreach (DataRow row in table.Rows)
//{
// foreach (DataColumn column in table.Columns)
// {
// ColumnName = column.ColumnName;
// ColumnData = row[column].ToString();
// }
//}
} /// <summary>
///
/// </summary>
/// <param name="tableName"></param>
/// <param name="connection"></param>
/// <returns></returns>
private DataTable GetReaderSchema(string tableName, SQLiteConnection connection)
{
DataTable schemaTable = null;
IDbCommand cmd = new SQLiteCommand();
cmd.CommandText = string.Format("select * from [{0}]", tableName);
cmd.Connection = connection; using (IDataReader reader = cmd.ExecuteReader(CommandBehavior.KeyInfo | CommandBehavior.SchemaOnly))
{
schemaTable = reader.GetSchemaTable();
}
return schemaTable;
}
/// <summary>
/// 获取表列信息
/// KS_Config
/// </summary>
/// <returns></returns>
public DataTable GetColumnInfo(string tableName, string connectionString)
{
//connectionString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=E:\Project\OrgCertificate\OrgCertificate\bin\Debug\OrgCertificateDB.mdb;User ID=;Password=;";
using (SQLiteConnection connection = new SQLiteConnection(connectionString))
{
connection.Open();
DataTable dt = connection.GetSchema("Columns");
DataView view = new DataView();
view.Table = dt;
view.RowFilter = string.Format("table_name='{0}'", tableName);
//conn.Close();
return view.ToTable();
}
}
/// <summary>
/// 获取表主键信息
/// KS_Config
/// </summary>
/// <param name="tableName"></param>
/// <returns></returns>
public DataTable GetPrimaryInfo(string tableName, string connectionString)
{
using (SQLiteConnection connection = new SQLiteConnection(connectionString))
{
connection.Open();
DataTable dt = connection.GetSchema("IndexColumns");
DataView view = new DataView();
view.Table = dt;
view.RowFilter = string.Format("table_name='{0}'", tableName);
//conn.Close();
return view.ToTable();
}
}
/// <summary>
/// 获取外键信息
/// TABLE_NAME,CONSTRAINT_TYPE,FKEY_FROM_COLUMN,FKEY_TO_TABLE,FKEY_TO_COLUMN
/// 主表
/// </summary>
/// <param name="tableName"></param>
/// <param name="connectionString"></param>
/// <returns></returns>
public DataTable GetForeignKeyParentInfo(string tableName, string connectionString)
{
using (SQLiteConnection connection = new SQLiteConnection(connectionString))
{
connection.Open();
DataTable dt = connection.GetSchema("ForeignKeys");
DataView view = new DataView();
view.Table = dt;
view.RowFilter = string.Format("FKEY_TO_TABLE='{0}'", tableName);
//conn.Close();
return view.ToTable();
}
}
/// <summary>
///
/// </summary>
/// <param name="tableName"></param>
/// <param name="columnName"></param>
/// <param name="connectionString"></param>
/// <returns></returns>
public DataTable GetForeignKeyParentInfo(string tableName,string columnName,string connectionString)
{
using (SQLiteConnection connection = new SQLiteConnection(connectionString))
{
connection.Open();
DataTable dt = connection.GetSchema("ForeignKeys");
DataView view = new DataView();
view.Table = dt;
view.RowFilter = string.Format("FKEY_TO_TABLE='{0}' and FKEY_TO_COLUMN='{1}'", tableName,columnName);
//conn.Close();
return view.ToTable();
}
}
/// <summary>
/// 从表
/// </summary>
/// <param name="tableName"></param>
/// <param name="connectionString"></param>
/// <returns></returns>
public DataTable GetForeignChildKeyInfo(string tableName, string connectionString)
{
using (SQLiteConnection connection = new SQLiteConnection(connectionString))
{
connection.Open();
DataTable dt = connection.GetSchema("ForeignKeys");
DataView view = new DataView();
view.Table = dt;
view.RowFilter = string.Format("TABLE_NAME='{0}'", tableName);
//conn.Close();
return view.ToTable();
}
}
/// <summary>
///
/// </summary>
/// <param name="tableName"></param>
/// <param name="columnName"></param>
/// <param name="connectionString"></param>
/// <returns></returns>
public DataTable GetForeignChildKeyInfo(string tableName, string columnName, string connectionString)
{
using (SQLiteConnection connection = new SQLiteConnection(connectionString))
{
connection.Open();
DataTable dt = connection.GetSchema("ForeignKeys");
DataView view = new DataView();
view.Table = dt;
view.RowFilter = string.Format("TABLE_NAME='{0}' and FKEY_FROM_COLUMN='{1}'", tableName,columnName);
//conn.Close();
return view.ToTable();
}
}
}
}
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