在我的表我改变了我的CLOB到一个BLOB转换文本进入发表blob为字节。数组,然后读取时价值convery字节数组的toString。
//insert code
System.Text.Encoding enc = System.Text.Encoding.ASCII;
byte[] blobByteArray = enc.GetBytes(text);
string sql = "insert into xxxxx (id,name,script_blob) values (?,?,?)";
cmd = new OdbcCommand(sql, conn);
cmd.CommandTimeout = _cmdtimeout;
cmd.Parameters.Add("id", OdbcType.VarChar);
cmd.Parameters["id"].Value = script_id;
cmd.Parameters.Add("name", OdbcType.VarChar);
cmd.Parameters["name"].Value = name;
cmd.Parameters.Add("script_blob", OdbcType.Binary);
cmd.Parameters["script_blob"].Value = blobByteArray;
int i = cmd.ExecuteNonQuery();
//read blob back from db
System.Text.Encoding enc = System.Text.Encoding.ASCII;
string sql = "select id,name,script_blob from bc_script";
cmd = new OdbcCommand(sql, conn);
cmd.CommandTimeout = _cmdtimeout;
OdbcDataReader dr2 = cmd.ExecuteReader();
if (dr2.HasRows)
{
rtn = new List<BCScript>();
while (dr2.Read())
{
string Script_text = enc.GetString((byte[])dr2["script_blob"]);
}
}
cmd.Dispose();
你可以发布你正在使用? – 2009-06-04 08:02:42