Question

我的某个程序有点问题。在这个我已经在SQL中创建了一个关于不同油漆的卖家和买家的数据库（颜色如绿色，红色等）。然后，当数据库完成后，我在C＃中创建了一个客户端应用程序并将其连接到数据库。数据库中的每个表（名称为Fakturace - Billing，Bill）我能够在我的form2中的dataGrid上打印。麻烦开始了 - 当我尝试添加卖方或买方的另一个Reord或Bill或Paint时，有一个异常会不断出现。它包含在图片中。

代码是：`

    int id_kup;
    int id_barva;
    int id_faktura;

    string jm;
    string prijm;
    string tel_cisl;
    int cislo_uctu;
    string alias;
    int ičo;
    int dič;
    string adresa;

    int kod;
    string naz_bar;
    string znacka;
    string typ;
    int dph;
    double jedn_cena;
    double mnozstvi;

    string dat_splat;
    string dat_vyst;
    string datum_plneni;
    int var_sym; 
    int konst_symb;
    int id_prod1;
    int id_kup1;

    private void Form2_Load(object sender, EventArgs e)
    {
        textBox1.Visible = false;
        textBox2.Visible = false;
        textBox3.Visible = false;
        textBox4.Visible = false;
        textBox5.Visible = false;
        textBox6.Visible = false;
        textBox7.Visible = false;
        textBox8.Visible = false;
        textBox9.Visible = false;
        button14.Visible = false;
    }

    private void button1_Click(object sender, EventArgs e)
    {
        DBVrstva d1 = new DBVrstva();
        d1.nacti_prodejce(dataGridView1);
    }

    private void button4_Click(object sender, EventArgs e)
    {
        DBVrstva d4 = new DBVrstva();
        d4.nacti_kupujícího(dataGridView2);
    }

    private void button7_Click(object sender, EventArgs e)
    {
        DBVrstva d7 = new DBVrstva();
        d7.nacti_barvu(dataGridView3);
    }

    private void button13_Click(object sender, EventArgs e)
    {
        DBVrstva d13 = new DBVrstva();
        d13.nacti_fakturu(dataGridView4);
    }

    private void button2_Click(object sender, EventArgs e)
    {
        int id = Convert.ToInt32(textBox1.Text);
        jm = textBox2.Text;
        prijm = textBox3.Text;
        tel_cisl = textBox4.Text;
        cislo_uctu = Convert.ToInt32(textBox5.Text);
        alias = textBox6.Text;
        ičo = Convert.ToInt32(textBox7.Text);
        dič = Convert.ToInt32(textBox8.Text);
        adresa = textBox9.Text;

        textBox1.Visible = true;
        textBox2.Visible = true;
        textBox3.Visible = true;
        textBox4.Visible = true;
        textBox5.Visible = true;
        textBox6.Visible = true;
        textBox7.Visible = true;
        textBox8.Visible = true;
        textBox9.Visible = true;

        button14.Visible = true;

        try
        {
            String Cstr = @"server= BLACK-TOSHIBA\SQLEXPRESS;database = Fakturace;UID=sa;PWD=f10dr0v1c";
            string ctext = "insert into Prodejce(id_prod,jm,prijm,tel_cisl,cislo_uctu, alias, ičo,dič,adresa) values('" + id + "','" + jm + "','" + prijm + "','" + tel_cisl + "','" + cislo_uctu + "','" + alias + "','" + ičo + "','" + dič + "','" + adresa + "')";
            DBVrstva da = new DBVrstva();
            da.Transakce(ctext, Cstr);
        }
        catch (Exception)
        {
            MessageBox.Show("Zadal jsi něco špatně");
        }
    }

    private void button10_Click(object sender, EventArgs e)
    {
        MessageBox.Show(" Ukončujete aplikaci! ");
        Application.Exit();
    }

    private void button3_Click(object sender, EventArgs e)
    {
         //odebrat prodavajiciho
    }

    private void button5_Click(object sender, EventArgs e)
    {
        //pridat kupujiciho
        id_kup = Convert.ToInt32(textBox1.Text);
        jm = textBox2.Text;
        prijm = textBox3.Text;
        tel_cisl = textBox4.Text;
        cislo_uctu = Convert.ToInt32(textBox5.Text);
        alias = textBox6.Text;
        ičo = Convert.ToInt32(textBox7.Text);
        dič = Convert.ToInt32(textBox8.Text);
        adresa = textBox9.Text;

        textBox1.Visible = true;
        textBox2.Visible = true;
        textBox3.Visible = true;
        textBox4.Visible = true;
        textBox5.Visible = true;
        textBox6.Visible = true;
        textBox7.Visible = true;
        textBox8.Visible = true;
        textBox9.Visible = true;

        button14.Visible = true;

        textBox1.Text = "";
        textBox2.Text = "";
        textBox3.Text = "";
        textBox4.Text = "";
        textBox5.Text = "";
        textBox6.Text = "";
        textBox7.Text = "";
        textBox8.Text = "";
        textBox9.Text = "";

        try
        {
            String Cstr = @"server= BLACK-TOSHIBA\SQLEXPRESS;database = Fakturace;UID=sa;PWD=f10dr0v1c";
            string ctext = "insert into Kupující(id_kup,jm,prijm,tel_cisl,cislo_uctu, alias, ičo,dič,adresa) values('" + id_kup + "','" + jm + "','" + prijm + "','" + tel_cisl + "','" + cislo_uctu + "','" + alias + "','" + ičo + "','" + dič + "','" + adresa + "')";
            DBVrstva da = new DBVrstva();
            da.Transakce(ctext, Cstr);
        }
        catch (Exception)
        {
            MessageBox.Show("Zadal jsi něco špatně");
        }
    }

    private void button6_Click(object sender, EventArgs e)
    {
        //odebrat prodavajiciho
    }

    private void button8_Click(object sender, EventArgs e)
    {
        //pridat barvu

        textBox1.Visible = true;
        textBox2.Visible = true;
        textBox3.Visible = true;
        textBox4.Visible = true;
        textBox5.Visible = true;
        textBox6.Visible = true;
        textBox7.Visible = true;
        textBox8.Visible = true;

        id_barva = Convert.ToInt32(textBox1.Text);
        kod = Convert.ToInt32(textBox2.Text);
        naz_bar = textBox3.Text;
        znacka = textBox4.Text;
        typ = textBox5.Text;
        dph = Convert.ToInt32(textBox6.Text);
        jedn_cena = Convert.ToDouble(textBox7.Text);
        mnozstvi = Convert.ToDouble(textBox8.Text);

        try
        {
            String Cstr = @"server= BLACK-TOSHIBA\SQLEXPRESS;database = Fakturace;UID=sa;PWD=f10dr0v1c";
            string ctext = "insert into Barva(id_barva, kod, naz_bar,znacka, typ, dph, jedn_cena, mnozstvi) values('" + id_barva + "','" + kod + "','" + naz_bar + "','" + znacka + "','" + typ + "','" + dph + "','" + jedn_cena + "','" + mnozstvi + "')";
            DBVrstva da = new DBVrstva();
            da.Transakce(ctext, Cstr);

        }
        catch (Exception)
        {
            MessageBox.Show("Zadal jsi něco špatně");
        }

    }

    private void button9_Click(object sender, EventArgs e)
    {
        //odebrat barvu
    }

    private void button12_Click(object sender, EventArgs e)
    {
        //pridat fakturu

        textBox1.Visible = true;
        textBox2.Visible = true;
        textBox3.Visible = true;
        textBox4.Visible = true;
        textBox5.Visible = true;
        textBox6.Visible = true;
        textBox7.Visible = true;
        textBox8.Visible = true;
        textBox9.Visible = true;

        id_faktura = Convert.ToInt32(textBox1.Text);
        dat_splat = textBox2.Text;
        dat_vyst = textBox3.Text;
        datum_plneni = textBox4.Text;
        var_sym = Convert.ToInt32(textBox5.Text);
        konst_symb = Convert.ToInt32(textBox6.Text);
        id_prod1 = Convert.ToInt32(textBox7.Text);
        id_kup1 = Convert.ToInt32(textBox8.Text);
        int id_bar1 = Convert.ToInt32(textBox9.Text);

         try
        {
            String Cstr = @"server= BLACK-TOSHIBA\SQLEXPRESS;database = Fakturace;UID=sa;PWD=f10dr0v1c";
            string ctext = "insert into Faktura(id_faktura,dat_splat,dat_vyst,datum_plneni,var_sym,konst_symb,id_prod1,id_kup1,id_bar1) values('" + id_faktura + "','" + dat_splat + "','" + dat_vyst + "','" + datum_plneni + "','" + var_sym + "','" + konst_symb + "','" + id_prod1 + "','" + id_kup1 + "','" + id_bar1 + "',' )";
            DBVrstva da = new DBVrstva();
            da.Transakce(ctext, Cstr);

        }
        catch (Exception)
        {
            MessageBox.Show("Zadal jsi něco špatně");
        }

    }

    private void button11_Click(object sender, EventArgs e)
    {
        //odebrat fakturu
    }

}

`

请注意，这只是Form2的代码 - 还有用于登录应用程序的表单1和名为DBVrstava的类，我用它来支持与数据库和SQL服务器的连接。

C＃问题 - System.FormatException未处理

0 个答案: