将值从 datagridview 插入到 sql

Question

我想将数据从 datagridview 插入数据库，但没有成功第一个按钮从 xls 导入数据，第二个按钮应该将所有数据插入数据库，而不仅仅是一条记录。我该如何解决？

    private void button8_Click(object sender, EventArgs e)
    {
        string stringconn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + textBox2.Text + ";Extended Properties=\"Excel 8.0;HDR=Yes;\";";
        OleDbConnection cons = new OleDbConnection(stringconn);
        OleDbDataAdapter dat = new OleDbDataAdapter("Select * from [Sheet1$]", cons);
        dat.Fill(dt);

        dataGridView1.DataSource = dt;
    }

    private void button9_Click(object sender, EventArgs e)
    {
        try
        {
            load();
            conn.Open();
            string col1 = dataGridView1[0, dataGridView1.CurrentCell.RowIndex].Value.ToString();
            string col2 = dataGridView1[1, dataGridView1.CurrentCell.RowIndex].Value.ToString();
            string col3 = dataGridView1[2, dataGridView1.CurrentCell.RowIndex].Value.ToString();

            string insert_sql = "INSERT INTO humans VALUES('" + col1 + "','" + col2 + "','" + col3 + "')";

            da = new NpgsqlDataAdapter(insert_sql, conn);
            da.SelectCommand.ExecuteNonQuery();

            conn.Close();
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message);
        }
    }

Answer 1

可能问题出在数据类型上，因为列值是字符串所以你应该像下面这样传递字符串值，试试这个：

 string query = "Insert into [User].[dbo].[songsN1] (songsName,path) Values (@c1,@c2,c3)";
                command.Parameters.AddWithValue("@c1", col1);
                command.Parameters.AddWithValue("@c2",col2);
                command.Parameters.AddWithValue("@c3", col3);

将值从 datagridview 插入到 sql

Insert value from datagridview to sql

c#

datagridview

npgsql