public static DataTable GetDbTableColumnSchema(string tablename, string sqlconnection)
{
string sql = @"
SELECT tablename = d.name, tableDescription = ISNULL(f.value, ''), [order] = a.colorder, columnName = a.name,
isIdentity = CASE WHEN COLUMNPROPERTY(a.id, a.name, 'IsIdentity') = 1 THEN 1
ELSE 0
END,
isPrimarykey = CASE WHEN EXISTS ( SELECT 1
FROM sysobjects
WHERE xtype = 'PK' AND parent_obj = a.id AND name IN ( SELECT name
FROM sysindexes
WHERE indid IN ( SELECT indid
FROM sysindexkeys
WHERE id = a.id AND colid = a.colid ) ) )
THEN 1
ELSE 0
END, dbtype = b.name, occupyByteLength = a.length, [length] = COLUMNPROPERTY(a.id, a.name, 'PRECISION'),
precision = ISNULL(COLUMNPROPERTY(a.id, a.name, 'Scale'), 0), isAllowNull = CASE WHEN a.isnullable = 1 THEN 1
ELSE 0
END, defaultValue =REPLACE(REPLACE(ISNULL(e.text, ''),'(',''),')',''), Description = ISNULL(g.[value], '')
FROM syscolumns a
LEFT JOIN systypes b ON a.xusertype = b.xusertype
INNER JOIN sysobjects d ON a.id = d.id AND d.xtype = 'U' AND d.name <> 'dtproperties'
LEFT JOIN syscomments e ON a.cdefault = e.id
LEFT JOIN sys.extended_properties g ON a.id = g.major_id AND a.colid = g.minor_id
LEFT JOIN sys.extended_properties f ON d.id = f.major_id AND f.minor_id = 0
WHERE d.name = @tablename --如果只查询指定表,加上此条件
ORDER BY a.id, a.colorder;";
DataSet ds = new DataSet();
DataCommon.DataBaseConnectionString = sqlconnection;
List <DbParameter> listParam = new List <DbParameter>();
listParam.Add(new SqlParameter()
{
DbType = DbType.String, ParameterName = "@tablename", SqlValue = tablename, Direction = ParameterDirection.Input, Size = 50
});
DataCommon.Fill(sqlconnection, sql, CommandType.Text, ds, listParam, FrameWork.Core.FrameData.DataBaseType.SqlServer, "tableschema");
if (ds.Tables.Count == 0)
{
return(null);
}
return(ds.Tables["tableschema"]);
}
/// <summary>
/// 获取数据库表列表
/// </summary>
/// <param name="tablename"></param>
/// <param name="sqlconnection"></param>
/// <returns></returns>
public static DataTable GetTableList(string tablename, string sqlconnection)
{
string sql = @"
SELECT DISTINCT
d.name, f.value AS [Description]
FROM syscolumns a
LEFT JOIN systypes b ON a.xusertype = b.xusertype
INNER JOIN sysobjects d ON a.id = d.id AND d.xtype = 'U' AND d.name <>'dtproperties'
LEFT JOIN syscomments e ON a.cdefault = e.id
LEFT JOIN sys.extended_properties g ON a.id = g.major_id AND a.colid = g.minor_id
LEFT JOIN sys.extended_properties f ON d.id = f.major_id AND f.minor_id = 0
WHERE ISNULL(@tablename,'')='' OR d.name LIKE @tablename+'%' ORDER BY d.name" ;
DataSet ds = new DataSet();
DataCommon.DataBaseConnectionString = sqlconnection;
List <DbParameter> listParam = new List <DbParameter>();
listParam.Add(new SqlParameter()
{
DbType = DbType.String, ParameterName = "@tablename", SqlValue = tablename, Direction = ParameterDirection.Input, Size = 50
});
DataCommon.Fill(sqlconnection, sql, CommandType.Text, ds, listParam, FrameWork.Core.FrameData.DataBaseType.SqlServer, "tablesList");
return(ds.Tables["tablesList"]);
}
