Updating lobs using oraclecommand and oracleparameter
Varchar2); Oracle Parameter diff Parameter = new Oracle Parameter("mark_diff_oracle", Oracle Db Type. Show(table_name field_name); //create parameters Oracle Parameter field Paramater = new Oracle Parameter("field_name", Oracle Db Type. Before you can update a CLOB column with that Lob Locator, you need to create and populate a temporary CLOB first. NET samples directory in your Oracle Home there should be a LOB directory, in there it looks like samples5might be a good place to start. Text; // Create an Oracle Clob object, specifying no caching and not a NCLOB Oracle Clob clob = new Oracle Clob(con, false, false); // Write data to the Oracle Clob object, clob, which is a temporary LOB string str = "this is a new story"; clob. Here is a snippet from it: // Set the command Oracle Command cmd = new Oracle Command( "update multimedia_tab set story = :1 where thekey = 1"); cmd. Value = 4; Offcourse, you should make sure that the variables you're adding to the string do not contain any harmfull statements. Perhaps, you can even verify if the table Name or the field Name that has been passed, is a valid / existing table Name/columnname. How to insert CLOB field in Oracle using C# Is it possible to do this through a prepared query? Execute Non Query(); // this line throws an exception Edit: My answer below applies for typical use of Clobs where the size is greater than 32k (what they were designed for). AFAIK, you cannot use parameters to define the column that you're updating.
Actually, can you list what datatypes your fields in PRODUCT is and also the datatypes of the corresponding parameters.To do so, invoke the Execute Non Query method on the Oracle Command object, just as you would if you were not using arrays: To appreciate the steps involved in performing this task, step through the sample application code in Visual Studio to see how the pieces fit together. To make error handling easier, review the Oracle Error Collection, Oracle Parameter, and Oracle Command topics in the ODP. Using Oracle Error Collection, you can pinpoint which data in an array resulted in an errorwhich can be especially helpful if you are working with larger arrays.This code doesn’t force multiple round-trips by sending the data in single rows, which is apparent because the Execute Non Query method is invoked a single time to process all the rows: // create command and set properties Oracle Command cmd = con. With just a few simple additional steps, you can extend the sample application to perform any needed actions in your environment., January/February 2007). Query: I have also found the following description, but I would really want to be able to keep the prepared query. Note that we are not using the default oracle client as we require bulk insertion. NET Framework version are unfortunately a hard requirement and we may not change that.