在具有预定义列的数据网格视图中显示 sql 数据

Question

当在 PID（文本框）中输入 id（在数据库中）时，我希望 sql 数据显示在数据网格预定义列中。例如：如果我在文本框中输入 1，product_Name(wai wai chicken) 应该显示在 Particulars 列中，product_Id(1) 本身应该显示在 PID 列中，actual_Sp(15) 应该显示在 Amount 列中，并且当在数量文本框中输入数字，它应该显示在单位数量列中，并且应该乘以金额（例如，当输入 1 时，显示 wai wai 以及当在数量文本框中输入 2 时，金额显示为 15（actual_sp），金额应该显示 30(as 15*2=30))。

我尝试了以下代码，但它在我的 DGV 中添加了新列，而不是在我的预定义列中显示：

string cc = "";
        int n;
        if (int.TryParse(textBox1.Text, out n))
        {
            cc = "product_Id = " + textBox1.Text.Trim();
        }
        else
        {
            cc = "product_Name LIKE '%" + textBox1.Text.Trim() + "%'";
        }

        if (string.IsNullOrEmpty(textBox1.Text))
        {
            cc = "1 = 1";
        }

        SqlConnection con = new SqlConnection("Data Source=SUMIT;Initial Catalog=Project;Integrated Security=True");

        SqlCommand cmd = new SqlCommand("Select product_Name as [Product Name],cast(actual_Sp as INT) * '" + textBox2.Text + " 'as [Actual SP] from Product WHERE " + cc, con); ;

    cmd.CommandType = CommandType.Text;
        SqlDataAdapter sda = new SqlDataAdapter(cmd);

        DataTable dt = new DataTable();
        sda.Fill(dt);
        dataGridView1.AutoGenerateColumns = false;
       dataGridView1.ColumnCount = 7;

        dataGridView1.Columns[0].Name = "ProductId";
        dataGridView1.Columns[0].HeaderText = "PID";
        dataGridView1.Columns[0].DataPropertyName = "product_Id";

        dataGridView1.Columns[1].HeaderText = "S.N.";
        dataGridView1.Columns[1].Name = "Serial Number";

        dataGridView1.Columns[2].Name = "Particulars";
        dataGridView1.Columns[2].HeaderText = "Particulars";
        dataGridView1.Columns[2].DataPropertyName = "product_Name";


        dataGridView1.Columns[3].Name = "Unit Quantity";
        dataGridView1.Columns[3].HeaderText = "Unit Quantity";

        dataGridView1.Columns[4].Name = "Amount";
        dataGridView1.Columns[4].HeaderText = "Amount";

        dataGridView1.Columns[5].Name = "Discount";
        dataGridView1.Columns[5].HeaderText = "Discount";

        dataGridView1.Columns[6].Name = "Sub-Total";
        dataGridView1.Columns[6].HeaderText = "Sub-Total";     
        dataGridView1.DataSource = dt;

    }

Answer 1

这可能对你有用。

SqlDataAdapter a = new SqlDataAdapter(
                    "Select product_Name as [Product Name],
                            actual_Sp as [Actual SP] from Product WHERE " + cc, con);

与

SqlDataAdapter a = new SqlDataAdapter(
                    "Select product_Name as [Product Name], 
                            actual_Sp * " + TxtQty.Text + " as [Actual SP] 
                            from Product WHERE " + cc, con);

这将乘以 actual_Sp 为您添加到文本框的数量