使用C#返回SQL版本

Question

我正在努力使用C#返回一个SQL版本,我是SQL编程的新手,所以任何帮助都会很棒.我遇到了各种各样的错误,但下面是我最近的尝试.

private void buttonOK_Click(object sender, System.EventArgs e)
{
    string strSqlVersion = SQLVersion();
    MessageBox.Show(strSqlVersion);
}

private void sqlversion(string sqlver)
{
    OdbcConnection conn = null;
    try
    {
        conn = getConnection(comboBoxDatabase.Text);
        string strSql = "SELECT @@VERSION";
        conn.Open();
        OdbcCommand cmd = new OdbcCommand(strSql, conn);
        string returnvalue = (string)cmd.ExecuteScalar();
        return returnvalue;
    }
    catch (Exception ex){ }
    finally
    {
        conn.Close();
    }
}

Answer 1

你可以这样做:

var dbProviderFactory = DbProviderFactories.GetFactory(ConnectionStringSettings.ProviderName);
conn = dbProviderFactory .CreateConnection();
conn.ConnectionString = ...
conn.Open();
string serverVersion = conn.ServerVersion;

这与数据库无关.

Answer 2

您的方法声明为void,将其更改为String:

private string sqlversion(string sqlver)
{
    OdbcConnection conn = null;
    try
    {
        conn = getConnection(comboBoxDatabase.Text);
        string strSql = "SELECT @@VERSION";
        conn.Open();
        OdbcCommand cmd = new OdbcCommand(strSql, conn);
        string returnvalue = (string)cmd.ExecuteScalar();
        return returnvalue;
    }
    catch (Exception ex){ }
    finally
    {
        conn.Close();
    }
}