Asp.net SqlDataReader转成Datatable

所属栏目：Asp.net 编程 | 发布日期：2013年04月05日 | 点击：517 次

内容摘要：Asp.net 数据存储，呈现方式有多种，如DataSet,DataTable,DataView,DataReader,IList等等，做得多了，常会需要将数据存储类型相互转换，这边介绍DataReader转DataTable的方法。

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/// <summary>
/// SqlDataReader转成DataTable实现方法
/// </summary>
/// <param name="strSql"></param>
/// <returns></returns>
protected DataTable DataReaderToDataTable(string strSql)
{
string connstr = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
SqlConnection sqlConn = new SqlConnection(connstr);
SqlCommand sqlComm = new SqlCommand(strSql, sqlConn);
SqlDataReader dataReader = null;
DataTable dtReturn = null;
object[] value = null;
try
{
sqlComm.Connection.Open();
dataReader = sqlComm.ExecuteReader();
if (dataReader.HasRows)
{
dtReturn = CreateTableBySchemaTable(dataReader.GetSchemaTable());
value = new object[dataReader.FieldCount];
while (dataReader.Read())
{
dataReader.GetValues(value);
dtReturn.LoadDataRow(value, true);
}
value = null;
}
}
catch (Exception err)
{}
finally
{
dataReader.Close();
sqlComm.Connection.Close();
sqlComm.Dispose();
}
return dtReturn;
}
      /// <summary>


    /// 本方法创建表各个列的名


    /// </summary>


    /// <param name="pSchemaTable">是一个表的结构表</param>


    /// <returns></returns>
protected DataTable CreateTableBySchemaTable(DataTable pSchemaTable)
{
DataTable dtReturn = new DataTable();
DataColumn dc = null;
DataRow dr = null;
for (int i = 0; i < pSchemaTable.Rows.Count; i++)
{
dr = pSchemaTable.Rows[i];
dc = new DataColumn(dr["ColumnName"].ToString(), dr["DataType"] as Type);
dtReturn.Columns.Add(dc);
}
dr = null;
dc = null;
return dtReturn;
}

    /// <summary>
    /// SqlDataReader转成DataTable实现方法
    /// </summary>
    /// <param name="strSql"></param>
    /// <returns></returns>
    protected DataTable DataReaderToDataTable(string strSql)
    {
        string connstr = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
        SqlConnection sqlConn = new SqlConnection(connstr);
        SqlCommand sqlComm = new SqlCommand(strSql, sqlConn);
        SqlDataReader dataReader = null;
        DataTable dtReturn = null;
        object[] value = null;
        try
        {
            sqlComm.Connection.Open();
            dataReader = sqlComm.ExecuteReader();
            if (dataReader.HasRows)
            {
                dtReturn = CreateTableBySchemaTable(dataReader.GetSchemaTable());
                value = new object[dataReader.FieldCount];
                while (dataReader.Read())
                {
                    dataReader.GetValues(value);
                    dtReturn.LoadDataRow(value, true);
                }
                value = null;
            }

        }
        catch (Exception err)
        {}
        finally
        {
            dataReader.Close();
            sqlComm.Connection.Close();
            sqlComm.Dispose();
        }
        return dtReturn;
    }

    /// <summary>
    
    /// 本方法创建表各个列的名
    
    /// </summary>
    
    /// <param name="pSchemaTable">是一个表的结构表</param>
    
    /// <returns></returns>  
    protected DataTable CreateTableBySchemaTable(DataTable pSchemaTable)
    {
        DataTable dtReturn = new DataTable();
        DataColumn dc = null;
        DataRow dr = null;
        for (int i = 0; i < pSchemaTable.Rows.Count; i++)
        {
            dr = pSchemaTable.Rows[i];
            dc = new DataColumn(dr["ColumnName"].ToString(), dr["DataType"] as Type);
            dtReturn.Columns.Add(dc);
        }
        dr = null;
        dc = null;
        return dtReturn;
    }

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作者：www.btnan.com，来源于：http://www.btnan.com，尊重作者，转载请注明。