How to read Array from access dataBase without denature.

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I saved elements into string[] BOX, then pass it to access database with:

C#

query = "insert into myDbase ([Name]) values(@cell0)", BOX);
OleCon.Open();
OleCmd.Connection = OleCon;
oleCmd.CommandType = CommandType.Text;
oleCmd.CommandText = query;
OleCmd.Parameters.Add(new OleDbParameter(("@cell[0]"),OleDbType.VarChar)).Value = BOX;
OleCmd.ExecuteNonQuery();
OleCon.Close();

Successful! Then reading the BOX from dataBase with:

query = "select * from myDbase"
OleCon.Open();
OleCmd.Connection = OleCon;
OleCmd.CommandType = CommandType.Text;
OleCmd.CommandText = query;
OleAdpt.SelectCommand = OleCmd;
OleAdpt.SelectCommand.ExecuteNonQuery();
OleCon.Close();
OleAdpt.Fill(dtSet);
return dtSet.Tables[0];

The problem now is:

C#

(string)dtSet.Table[0].Rows[5][0];

gives me string value - System.String[]

How do I get my BOX back just the way I sent it in - i.e. Array of 10 elemets?
Thank you.

Posted 28-Dec-14 3:12am

Salisu Shaibu

Updated 28-Dec-14 4:45am

Maciej Los

v2

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2 solutions

Solution 1

Well, it is most likely because the method BOX.ToString() is implicitly called in your query.
You can test what the code

C#

string s = BOX.ToString();

does.

If you really want to store an array of strings in one column in your database, which you really shouldn't, you need to loop through the array and save it into a string.

Example:

C#

StringBuilder boxString = new StringBuilder();
foreach (string s in BOX)
{
    boxString.Append(s);
    boxString.Append(",");   // [EDIT] Add a delimiter
}

string result = boxString.ToString().TrimEnd(',');

A much better solution would be to create a new table and store the strings in separate rows.

Posted 28-Dec-14 3:22am

George Jonsson

Updated 28-Dec-14 3:40am

v2

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DamithSL · Accepted Answer · 2014-12-28T03:33:00

Solution 2

set the parameter as

C#

OleCmd.Parameters.Add(new OleDbParameter(("@cell[0]"),OleDbType.VarChar)).Value =string.Join(",", BOX);

then you can read it back as

C#

string[]results  = ((string)dtSet.Table[0].Rows[5][0]).Split(',');

if your strings contain "," character you better use different delimiter character

Posted 28-Dec-14 3:33am

DamithSL

Updated 28-Dec-14 3:35am

v2

Comments

George Jonsson 28-Dec-14 9:41am