Question

在我的数据库中，我有一个名为CHIPSET的表，我用它将数据从DB检索到Form1上的CheckedListBox。到现在为止还挺好。现在，当我将数据插入数据库时，在相应的列下，我得到了＆＃34; System.Data.DataRowView＆＃34;选择的已检查项目数量的多少次。我在这里看了一下，我无法弄清楚如何在我的代码中解决这个问题。任何帮助将不胜感激。

这是我的代码：

public partial class Form1 : Form
{
    DB db = new DB();
    SqlConnection connection;
    Chipset catg = new Chipset();
    Model model = new Model();
    public Form1()
    {
        InitializeComponent();
        loadComboCategory();
    }

    public void loadComboCategory()
    {
        checkedListBox1.DataSource = catg.getCategories();
        checkedListBox1.DisplayMember = "CHIPSET";
        checkedListBox1.ValueMember = "CHIPSET_ID";
    }

    private void button1_Click(object sender, EventArgs e)
    {

        try
        {
            string str = "";
            if (checkedListBox1.CheckedItems.Count > 0)
            {
                for (int i = 0; i < checkedListBox1.CheckedItems.Count; i++)
                {
                    if (str == "")
                    {
                        str = checkedListBox1.CheckedItems[i].ToString();
                    }
                    else
                    {
                        str += ", " + checkedListBox1.CheckedItems[i].ToString();
                    }
                }
                connection = new SqlConnection(@"Data Source=.;Initial Catalog=AOC_DB;Integrated Security=True");
                connection.Open();
                SqlCommand cmd = new SqlCommand("Insert into data(Item_Id, Items) values(@Item_Id, @Items)", connection);
                cmd.Parameters.AddWithValue("@Item_Id", textBox1.Text);
                cmd.Parameters.AddWithValue("@Items", str);
                cmd.ExecuteNonQuery();
                MessageBox.Show("Data Inserted Successfully");
                connection.Close();
            }
            else
            {
                MessageBox.Show("Please select atleast one item");
            }
            while (checkedListBox1.CheckedItems.Count > 0)
            {
                checkedListBox1.SetItemChecked(checkedListBox1.CheckedIndices[0], false);
            }
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message + e.ToString());
        }

        if (textBox1.Text != string.Empty)
        {
            db.openConnection();
            model.insertModel(textBox1.Text);
            MessageBox.Show("New AOC Model Inserted Successfully", "Insert AOC Model", MessageBoxButtons.OK, MessageBoxIcon.Information);
        }
        else
        {
            MessageBox.Show("Enter The Model Name");
        }
    }
}

Answer 1

在搞乱之后，我最终通过替换代码来实现它

str = checkedListBox1.CheckedItems[i].ToString();

有了这个

str = checkedListBox1.GetItemText(checkedListBox1.CheckedItems[i]);

并且还替换了这个

str += ", " + checkedListBox1.CheckedItems[i].ToString();

有了这个：

str += ", " + checkedListBox1.GetItemText(checkedListBox1.CheckedItems[i]);

＆＃34; System.Data.DataRowView“而不是实际值

1 个答案: