Try this code.
public DataTable DataDownload(string question)
{
using (var ada = new SqlDataAdapter(question, DBconnection))
{
// Use DataAdapter to fill DataTable
DataTable dt = new DataTable();
ada.Fill(dt);
return dt;
}
}
insert sql commands by textbox
Вопрос
I created win forms, and I wanna insert sql commands and get data from database. If I put query directly into code sql commands, everything is ok, if I put query by textbox I have a lot of bugs like:
$exception {"Could not find stored procedure 'select * from uczniowie'."}
System.Exception {System.Data.SqlClient.SqlException } this {MateuszLab4.connectDB} MateuszLab4.connectDB question "\"select * from uczniowie\"" string dataTable {} System.Data.DataTable sqlDataReader null System.Data.SqlClient.SqlDataReader sqlCommand {System.Data.SqlClient.SqlCommand} System.Data.SqlClient.SqlCommand
Here is my code:
private void buttonSearch_Click(object sender, EventArgs e)
{
string query = textBoxQuery.Text;
connectDB databaseWin = new connectDB("(localdb)\\v11.0", "Mat");
dataGridViewAdvanced.DataSource = databaseWin.DataDownload(query);
}
When I put into string query sql commands (for example string query = "select * from students" ) everything is working very well. If I replaced with data from textbox sth is wrong. Could you give me some tips guys?
here is my class with datadownloada:
public DataTable DataDownload(string question)
{
DataTable dataTable = new DataTable();
SqlDataReader sqlDataReader;
SqlCommand sqlCommand;
sqlCommand = new SqlCommand(question);
sqlCommand.Connection = this.DBconnection;
sqlDataReader = sqlCommand.ExecuteReader();
dataTable.Load(sqlDataReader);
return dataTable;
}
Решение