c# - 无法将类型 'string' 隐式转换为 'decimal'

Question

private void button18_Click(object sender, EventArgs e)
    {
        Form1 stForm = new Form1();
        DialogResult result = stForm.ShowDialog(this);

        if (result == DialogResult.Cancel)
            return;
        Inscrierea__pentru_burs_sau_contract media = new Inscrierea__pentru_burs_sau_contract();
        media.Media_MNDP = stForm.MNDP.Text;
        media.Media_MNEA = stForm.MNEA.Text;
        media.Media_Concurs = stForm.MediaConcurs.Text;

        db.Media.Add(media);
        db.SaveChanges();
        MessageBox.Show("Salvarea a avut loc cu succes!!!");
    }

请帮我解决我的错误:

1. media.Media_MNDP = stForm.MNDP.Text;
2. media.Media_MNEA = stForm.MNEA.Text;
3. media.Media_Concurs = stForm.MediaConcurs.Text;

错误“无法将类型‘字符串’隐式转换为‘十进制’”

Answer 1

利用 Decimal.TryParse(string, out val)

示例:

decimal val;
if(Decimal.TryParse(stForm.MNDP.Text, out val))
    media.Media_MNDP = val;

最好使用 tryparse 方法，因为它可以避免抛出运行时异常