Sqlite C# on delete error no such column.

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1.00/5 (1 vote)

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Getting error that column does not exist. Just started learning.
Please little help?

System.Data.SQLite.SQLiteConnection sqlite_conn;
System.Data.SQLite.SQLiteCommand sqlite_cmd;
System.Data.SQLite.SQLiteDataReader sqlite_datareader;
private int sqlite_reader;

 private void button2_Click(object sender, EventArgs e)
{
sqlite_conn = new System.Data.SQLite.SQLiteConnection("Data Source=D:/main.db;Version=3;");
sqlite_conn.Open();
sqlite_cmd = sqlite_conn.CreateCommand();
sqlite_cmd.CommandText = "DELETE  FROM Table WHERE Name ="+comboBox1.Text+"";
sqlite_reader = sqlite_cmd.ExecuteNonQuery();
sqlite_conn.Close();
}

What I have tried:

Tried SELECT * FROM Table
DB works fine.

Posted 21-Sep-18 0:11am

Member 13988786

Updated 21-Sep-18 0:21am

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Maciej Los · Accepted Answer · 2018-09-21T00:22:00

Solution 1

Try this:

C#

sqlite_cmd.CommandText = string.Format("DELETE  FROM Table WHERE Name ='{0}'", comboBox1.Text);

For further details, please see:
SQLite WHERE - Filter Rows in a Result Set[^]

Note: your code is sql injection[^] vulnerable. You have to use parameters:

C#

this.command.CommandText = "DELETE FROM Table1 WHERE Name=@param1";
this.command.CommandType = CommandType.Text;
this.command.Parameters.Add(new SQLiteParameter("@param1", comboBox1.Text));

Posted 21-Sep-18 0:22am

Maciej Los

Updated 21-Sep-18 0:25am

v2

Comments

phil.o 21-Sep-18 6:42am

Downvote countered. Happened a few times this morning for perfectly valid solutions.

Maciej Los 21-Sep-18 6:50am

Thank you, Phil.

Member 13988786 21-Sep-18 18:56pm

Many thanks !! Will carry on learning.

Maciej Los 22-Sep-18 1:15am

You're very welcome.