Question

我对此进行了搜索，但是我发现的数据是5-6岁，并且 Bind（）;功能似乎不再有效。

所以我有这个函数可以填充我的DataGridView：

private void FillTable(string location, string supplier, string item) {
        string sql = "";
        string connString = "<connection info";

        // If ONLY Location is entered
        if (location != "" && supplier == "" && item == "") {
            sql = "SELECT " +
                    "      location_id AS 'Location', " +
                    "      supplier_id AS 'Supplier', " +
                    "      item_id AS 'Item', " +
                    "      recommended_qty_to_order AS 'Recommended Qty'" +
                    "  FROM PorgReqs  " +
                    "  WHERE location_id = @LocationID " +
                    "  ORDER BY supplier_id, item_id";

        }

        // Creates Connection, Sets Variables in Connection and tries to load table
        using (SqlConnection conn = new SqlConnection(connString)) {
            SqlCommand cmd = new SqlCommand(sql, conn);

            // Sets Variables
            cmd.Parameters.AddWithValue("@LocationID", txtLocation.Text);
            cmd.Parameters.AddWithValue("@SupplierID", txtLocation.Text);
            cmd.Parameters.AddWithValue("@ItemID", txtLocation.Text);

            // Opens Connection
            conn.Open();

            try 
            {
                // Creates Reader Object
                SqlDataReader sqlDataReader = cmd.ExecuteReader();

                // Fill the list box with the values retrieved
                if (sqlDataReader.HasRows) 
                {
                    DataTable dt = new DataTable();
                    dt.Load(sqlDataReader);
                    //MessageBox.Show(dt.ToString());
                    gridData.DataSource = dt;
                }
            } catch (Exception ex) {
                Console.WriteLine(ex.Message);
                MessageBox.Show(ex.Message);
            }
        }
    } // End Function

数据被拉取并加载，但是，它没有加载到我设置的列中：

我的网格最终看起来像这样：

我的搜索表明我需要将数据集绑定到网格，然后才能为该列设置DataPropertyName，以便正确加载它们。

请注意。我的目标是将数据加载到网格中，允许编辑“ addl qty”列，该列将反映在“ Final Qty”列中。然后单击它的“批准”复选框，它将信息写入一个单独的数据库，然后在单击“购买”按钮时进行处理。我以为DataGridView控件不是最好的方法，请在进入兔子洞之前让我知道。

Answer 1

我试图将DataTable绑定到DataGridView，以便按Designer格式化表格，并添加其他列。但是，这无法完成。

相反，我将DataTable加载到DataGridView中，然后将所需的列添加到DataGridView中。

这不是最优雅的，但是可以用...

private void FillTable(string location, string supplier, string item) {
        string sql = "";
        string connString = "<connect info>";

        // If ONLY Location is entered
        if (location != "" && supplier == "" && item == "") {
            MessageBox.Show("Only Location");
            sql = "SELECT " +
                    "      location_id AS 'Location', " +
                    "      supplier_id AS 'Supplier', " +
                    "      item_id AS 'Item', " +
                    "      recommended_qty_to_order AS 'Rec Qty'" +
                    "  FROM PorgReqs  " +
                    "  WHERE location_id = @LocationID " +
                    "  ORDER BY supplier_id, item_id";

        }

        // Creates Connection, Sets Variables in Connection and tries to load table
        using (SqlConnection conn = new SqlConnection(connString)) {
            SqlCommand cmd = new SqlCommand(sql, conn);

            // Sets Variable
            cmd.Parameters.AddWithValue("@LocationID", txtLocation.Text);

            // Opens Connection
            conn.Open();

            try 
            {
                // Creates Reader Object
                SqlDataReader sqlDataReader = cmd.ExecuteReader();


                // Fill the list box with the values retrieved
                if (sqlDataReader.HasRows) {
                    // Create DataTable
                    DataTable dt = new DataTable();

                    // Add Columns to DataTable
                    dt.Columns.Add("Location");
                    dt.Columns.Add("Supplier");
                    dt.Columns.Add("Item");
                    dt.Columns.Add("Rec Qty");
                    dt.Load(sqlDataReader);

                    gridData.DataSource = dt;


                    DataGridViewTextBoxColumn txtAddlQty = new DataGridViewTextBoxColumn();
                    txtAddlQty.Name = "AddlQty";
                    txtAddlQty.HeaderText = "Add'l Qty";
                    txtAddlQty.Width = 75;
                    gridData.Columns.Insert(4, txtAddlQty);

                    DataGridViewTextBoxColumn txtFinalQty = new DataGridViewTextBoxColumn();
                    txtFinalQty.Name = "FinalQty";
                    txtFinalQty.HeaderText = "Final Qty";
                    txtFinalQty.Width = 75;
                    gridData.Columns.Insert(5, txtFinalQty);

                    DataGridViewComboBoxColumn cboAction = new DataGridViewComboBoxColumn();
                    cboAction.Name = "Action";
                    cboAction.HeaderText = "Action";
                    cboAction.Items.AddRange("Buy", "Transfer", "Not Buy");
                    cboAction.Width = 75;
                    gridData.Columns.Insert(6, cboAction);

                    DataGridViewCheckBoxColumn chkApprove = new DataGridViewCheckBoxColumn();
                    chkApprove.Name = "Approve";
                    chkApprove.HeaderText = "Approve";
                    chkApprove.Width = 50;
                    gridData.Columns.Insert(7, chkApprove);

                    gridData.Columns["Location"].Width = 60;
                    gridData.Columns["Supplier"].Width = 60;
                    gridData.Columns["Item"].Width = 125;
                    gridData.Columns["Rec Qty"].Width = 75;

                    // Adds default value to the Action column
                    foreach (DataGridViewRow row in gridData.Rows) {
                        row.Cells["Action"].Value = "Buy";
                    }
                }

            } catch (Exception ex) {
                Console.WriteLine(ex.Message);
                MessageBox.Show(ex.Message);
            }
        }
    } // End Function

C＃将DataSet绑定到Windows Form App中的DataGridView

1 个答案: