我试图使用datagridview将多个数据输入到sql中，但是我很难绑定datagridview组合框以显示基于组合框（供应商）中所选项目的项目，我什至无法绑定我的SQL在datagridview组合框中，对不起，我是菜鸟，但我正在尝试完成此项目。下面的代码是我使用的代码，它基于单独的组合框和文本框，未绑定到datagridview。
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
using Inventory.Properties;
namespace Inventory
{
public partial class Form2 : Form
{
public Form2()
{
InitializeComponent();
}
SqlConnection conn = new SqlConnection(@"Data Source=MEDIXPC197;Initial Catalog=Inventory;Integrated Security=True");
SqlCommand cd = new SqlCommand();
private void label15_Click(object sender, EventArgs e)
{
}
private void Form2_Load(object sender, EventArgs e)
{
// TODO: This line of code loads data into the 'inventoryDataSet.dbTrans' table. You can move, or remove it, as needed.
this.dbTransTableAdapter.Fill(this.inventoryDataSet.dbTrans);
cc();
cc2();
cc3();
}
public void cc()
{
conn.Open();
SqlCommand cmd = conn.CreateCommand();
cmd.CommandType = CommandType.Text;
cmd.CommandText = "SELECT Department from tbldept";
cmd.ExecuteNonQuery();
DataTable dt = new DataTable();
SqlDataAdapter Da = new SqlDataAdapter(cmd);
Da.Fill(dt);
foreach (DataRow dr in dt.Rows)
{
comboBox1.Items.Add(dr["Department"].ToString());
comboBox2.Items.Add(dr["Department"].ToString());
}
conn.Close();
}
public void cc2()
{
conn.Open();
SqlCommand cmd = conn.CreateCommand();
cmd.CommandType = CommandType.Text;
cmd.CommandText = "select distinct Supplier from tblmaster";
cmd.ExecuteNonQuery();
DataTable dt = new DataTable();
SqlDataAdapter Da = new SqlDataAdapter(cmd);
Da.Fill(dt);
foreach (DataRow dr in dt.Rows)
{
comboBox3.Items.Add(dr["Supplier"].ToString());
}
conn.Close();
}
public void cc3()
{
conn.Open();
SqlCommand cmd = conn.CreateCommand();
cmd.CommandType = CommandType.Text;
cmd.CommandText = "SELECT [Transaction] from [tbltransac]";
cmd.ExecuteNonQuery();
DataTable dt = new DataTable();
SqlDataAdapter Da = new SqlDataAdapter(cmd);
Da.Fill(dt);
foreach (DataRow dr in dt.Rows)
{
comboBox4.Items.Add(dr["Transaction"].ToString());
}
conn.Close();
}
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
conn.Open();
SqlCommand cmd = conn.CreateCommand();
cmd.CommandType = CommandType.Text;
cmd.CommandText = "select * from tbldept where Department = '" + comboBox1.SelectedItem.ToString() + "'";
cmd.ExecuteNonQuery();
DataTable dt = new DataTable();
SqlDataReader dr = cmd.ExecuteReader();
SqlDataAdapter Da = new SqlDataAdapter(cmd);
conn.Close();
}
private void comboBox2_SelectedIndexChanged(object sender, EventArgs e)
{
conn.Open();
SqlCommand cmd = conn.CreateCommand();
cmd.CommandType = CommandType.Text;
cmd.CommandText = "select * from tbldept where Department = '" + comboBox2.SelectedItem.ToString() + "'";
cmd.ExecuteNonQuery();
DataTable dt = new DataTable();
SqlDataReader dr = cmd.ExecuteReader();
SqlDataAdapter Da = new SqlDataAdapter(cmd);
conn.Close();
}
private void comboBox3_SelectedIndexChanged(object sender, EventArgs e)
{
conn.Open();
SqlCommand cmd = conn.CreateCommand();
cmd.CommandType = CommandType.Text;
cmd.CommandText = "select * from tblmaster where Supplier = '" + comboBox3.SelectedItem.ToString() + "'";
cmd.ExecuteNonQuery();
DataTable dt = new DataTable();
SqlDataAdapter Da = new SqlDataAdapter(cmd);
Da.Fill(dt);
comboBox5.Items.Clear();
foreach (DataRow dr in dt.Rows)
{
comboBox5.Items.Add(dr["ProductCode"].ToString());
}
conn.Close();
}
private void comboBox4_SelectedIndexChanged(object sender, EventArgs e)
{
conn.Open();
SqlCommand cmd = conn.CreateCommand();
cmd.CommandType = CommandType.Text;
cmd.CommandText = "select * from [tbltransac] where [Transaction] = '" + comboBox4.SelectedItem.ToString() + "'";
cmd.ExecuteNonQuery();
DataTable dt = new DataTable();
SqlDataAdapter Da = new SqlDataAdapter(cmd);
conn.Close();
}
private void comboBox5_SelectedIndexChanged(object sender, EventArgs e)
{
conn.Open();
SqlCommand cmd = conn.CreateCommand();
cmd.CommandType = CommandType.Text;
cmd.CommandText = "select * from tblmaster where ProductCode = '" + comboBox5.SelectedItem.ToString() + "'";
cmd.ExecuteNonQuery();
DataTable dt = new DataTable();
SqlDataAdapter Da = new SqlDataAdapter(cmd);
Da.Fill(dt);
foreach (DataRow dr in dt.Rows)
{
textBox3.Text = dr["Description"].ToString();
textBox4.Text = dr["UM"].ToString();
textBox5.Text = dr["UP"].ToString();
}
conn.Close();
}
private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
}
}
}
编辑： 下图显示了我的设计，我想根据“供应商”组合框过滤datagridview内“项目代码”组合框中显示的内容 PHOTO
