Question

大家好我试图使用文本框插入一个布尔值，现在我得到一个错误，表示＆＃34;字符串未被识别为有效的布尔值。＆＃34;因为我在文本框中添加了0。

以下是我的业务层中插入值

的方法

public void ADD_CUSTOMER(string Customer_Code, string Customer_Nmae, string Address, string Country, string City, string Phone, string Fax, string Mobile,
        string Email, string Note, byte[] Cust_Imaige, decimal Credit, decimal Debit, decimal Balance, bool Statas, string criterion)
    {
        DAL.DataAccessLayer DAL = new DAL.DataAccessLayer();
        DAL.open();
        SqlParameter[] param = new SqlParameter[16];
        param[0] = new SqlParameter("@Customer_Code", SqlDbType.NVarChar, 25);
        param[0].Value = Customer_Code;

        param[1] = new SqlParameter("@Customer_Nmae", SqlDbType.NVarChar, 100);
        param[1].Value = Customer_Nmae;

        param[2] = new SqlParameter("@Address", SqlDbType.NVarChar, 100);
        param[2].Value = Address;

        param[3] = new SqlParameter("@Country", SqlDbType.NVarChar, 100);
        param[3].Value = Country;

        param[4] = new SqlParameter("@City", SqlDbType.NVarChar, 100);
        param[4].Value = City;

        param[5] = new SqlParameter("@Phone", SqlDbType.NVarChar, 100);
        param[5].Value = Phone;

        param[6] = new SqlParameter("@Fax", SqlDbType.NVarChar, 100);
        param[6].Value = Fax;

        param[7] = new SqlParameter("@Mobile", SqlDbType.NVarChar, 100);
        param[7].Value = Mobile;

        param[8] = new SqlParameter("@Email", SqlDbType.NVarChar, 100);
        param[8].Value = Email; 

        param[9] = new SqlParameter("@Note", SqlDbType.NVarChar, 100);
        param[9].Value = Note;

        param[10] = new SqlParameter("@Cust_Imaige", SqlDbType.Image);
        param[10].Value = Cust_Imaige;

        param[11] = new SqlParameter("@Credit", SqlDbType.Decimal);
        param[11].Value = Credit;

        param[12] = new SqlParameter("@Debit", SqlDbType.Decimal);
        param[12].Value = Debit;

        param[13] = new SqlParameter("@Balance", SqlDbType.Decimal);
        param[13].Value = Balance;

        param[14] = new SqlParameter("@Statas", SqlDbType.Bit);
        param[14].Value = Statas;

        param[15] = new SqlParameter("@criterion", SqlDbType.NVarChar, 50);
        param[15].Value = criterion;

        DAL.ExecuteCommand("ADD_CUSTOMER", param);
        DAL.close();

    }

现在下面是我的客户表格

 private void btn_Add_Click(object sender, EventArgs e)
    {
       try
        {
            byte[] Cust_Imaige;
            if (pictureBox1.Image == null)
            {
                Cust_Imaige = new byte[0];

                Customer.ADD_CUSTOMER(txt_Customer_Code.Text, txt_Customer_Nmae.Text, txt_Address.Text,
                    txt_Country.Text, txt_City.Text,txt_Phone.Text,txt_Fax.Text,txt_Mobail.Text,
                   txt_Email.Text, txt_Note.Text, Cust_Imaige,Convert.ToDecimal(txt_Credit.Text),
                   Convert.ToDecimal(txt_Debit.Text),Convert.ToDecimal(txt_Balance.Text),Convert.ToBoolean(txt_Statas.Text), "without_Image");
                MessageBox.Show("added","add",MessageBoxButtons.OK,MessageBoxIcon.Information);
            }
            else
            {
                MemoryStream ms = new MemoryStream();
                pictureBox2.Image.Save(ms, pictureBox2.Image.RawFormat);
                Cust_Imaige = ms.ToArray();
                Customer.ADD_CUSTOMER(txt_Customer_Code.Text, txt_Customer_Nmae.Text, txt_Address.Text,
                    txt_Country.Text, txt_City.Text, txt_Phone.Text, txt_Fax.Text, txt_Mobail.Text,
                   txt_Email.Text, txt_Note.Text, Cust_Imaige, Convert.ToDecimal(txt_Credit.Text),
                   Convert.ToDecimal(txt_Debit.Text), Convert.ToDecimal(txt_Balance.Text), Convert.ToBoolean(txt_Statas.Text), "with_Image");
                  MessageBox.Show("add","",MessageBoxButtons.OK,MessageBoxIcon.Information);

            }
        }


        catch
        {
            return;
        }
        finally
        {
            btn_Add.Enabled = false;
            btn_New.Enabled = true;
        }


    }

Answer 1

Convert.ToBoolean(txt_Statas.Text)无法使用1和0

您应该使用Checkbox并返回Checkbox.Checked

或者如果你想保留TextBox那么

将Convert.ToBoolean(txt_Statas.Text)替换为txt_Statas.Text == "1" ? true : false

Answer 2

我猜一个复选框更适合那个，因为复选框的值是一个布尔值。

无论如何，如果您想继续使用TextBox，请执行以下操作。

txt_Statas.Text == "1"

您更改的代码。

Customer.ADD_CUSTOMER(txt_Customer_Code.Text, txt_Customer_Nmae.Text, txt_Address.Text,
                    txt_Country.Text, txt_City.Text, txt_Phone.Text, txt_Fax.Text, txt_Mobail.Text,
                   txt_Email.Text, txt_Note.Text, Cust_Imaige, Convert.ToDecimal(txt_Credit.Text),
                   Convert.ToDecimal(txt_Debit.Text), Convert.ToDecimal(txt_Balance.Text), txt_Statas.Text == "1", "with_Image");

Answer 3

通过

转换为布尔值时

Convert.ToBoolean(txt_Statas.Text)

例程需要"True"或"False"形式的参数，而不是"0"或"1"：

https://msdn.microsoft.com/en-us/library/86hw82a3(v=vs.110).aspx

在你的情况下只是把

txt_Statas.Text == "1"

而不是Convert.ToBoolean(txt_Statas.Text)。

Answer 4

使用扩展方法创建一个通用实用程序类：

internal static class ConvertExtension {
    public static bool ToBoolean(this object value) {
        if (value == null or DBNull.Value.Equals(value)) return false;
        if (value is bool) return (bool)value;
        string obj =  value.ToString(CultureInfo.InvariantCulture);
        return !(string.IsNullOrEmpty(obj) 
            || string.Equals(obj, "0") 
            || string.Equals("false", obj, StringComparison.OrdinalIgnoreCase));
    }
}

<强>使用

将Convert.ToBoolean(txt_Statas.Text)修改为txt_Statas.Text.ToBoolean()

使用文本框在数据库中插入布尔值

4 个答案: