C# 获取数据库中所有表名、列名，实现代码如下所示：
List<Dictionary<string, string>> GetColsName(Guid gtype,string tableName,string itemIndex= "COLUMN_NAME")
{
DataTable dsTablesData = DbDataHelper.GetCon().GetOleDbSchemaTable(gtype, new Object[] { null, null, tableName, null });
List<Dictionary<string, string>> ditCol = new List<Dictionary<string, string>>() ;
for (int i = 0; i < dsTablesData.DefaultView.Table.Rows.Count; i++)
{
ditCol.Add(new Dictionary<string, string> { { i.ToString(), i.ToString() } });
}
foreach (DataRow item in dsTablesData.DefaultView.Table.Rows)
{
int pos = Convert.ToInt32(item["ORDINAL_POSITION"]);
int typeIndex = Convert.ToInt32(item["DATA_TYPE"]);
ditCol[pos-1]= new Dictionary<string, string> { { item[itemIndex].ToString(), DBData.getInstance().GetColNameType(typeIndex) } };
}
return ditCol;
}
List<string> GetTablesName(Guid gtype,string tableType ="TABLE", string strTableName =null , string itemIndex= "TABLE_NAME")
{
List<string> strNames = new List<string>();
DataTable dsTablesData = DbDataHelper.GetCon().GetOleDbSchemaTable(gtype, new Object[] { null, null, strTableName, tableType });
foreach (DataRow item in dsTablesData.DefaultView.Table.Rows)
{
strNames.Add(item[itemIndex].ToString());
}
return strNames;
}
调用
DBData.getInstance()._tableNames = GetTablesName(OleDbSchemaGuid.Tables);
foreach (var tableName in DBData.getInstance()._tableNames)
{
List<Dictionary<string, string>> tmp = GetColsName(OleDbSchemaGuid.Columns, tableName);
}
通过dataTable获取
/// <summary>
/// 根据datatable获得列名
/// </summary>
/// <param name="dt">表对象</param>
/// <returns>返回结果的数据列数组</returns>
public static List<string> GetColumnsByDataTable(DataTable dt)
{
List<string> list = new List<string>();
foreach (DataColumn item in dt.Columns)
{
list.Add(item.ColumnName);
}
return list;
}
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