如果為空/（空）c＃將datagridview單元格更改為組合框

Question

我正在使用C＃和sql server 2014在Windows窗體上工作。正如標題所述，如果它們為空，我想將特定列中的DataGridView單元更改為組合框字段。

我的表單加載方法是這樣的：

private void AdminPanel_Load(object sender, EventArgs e)
    {
        DBConn.ConnectToDatabase();

        dataGridViewAP.DataSource = DBConn.getAdminInfo();

    }

我有這樣的方法getAdminInfo（）

    public DataTable getAdminInfo()
    {
        try
        {
            string strCommand = "SELECT Customer.AccountNo AS [Account Number], Customer.Name AS [Customer Name], Customer.Adrs1 AS [Address 1], Customer.Adrs2 AS [Address 2], Customer.City AS [City], Customer.Province AS [Province], Customer.PostalCode AS [Postal Code], Customer.Email1 AS [Email], Manifest.Class AS [Class], Manifest.Rname AS [Recipient Name], Manifest.Adrs1 AS [Dest. Address 1],  Manifest.Adrs2 AS [Dest. Address 2],  Manifest.City AS [City],  Manifest.State AS [State], Manifest.PostalCode AS [Postal Code], Manifest.Country AS [Country], Manifest.Item AS [Description], Manifest.Weight AS [Weight (lb)], Manifest.Value AS [Value (USD)], Manifest.DateTime AS [Date/Time], Manifest.CheckedBy AS [Checked By], Customer.AccStatus AS [Account Status] FROM Customer INNER JOIN Manifest ON Customer.AccountNo = Manifest.FKAccountNo WHERE CONVERT(DATE,DateTime)=CONVERT(Date,GETDATE())";
            DataTable dt = new DataTable();
            SqlDataAdapter da = new SqlDataAdapter(strCommand, conn);
            da.Fill(dt);
            return dt;
        }
        catch (SqlException e)
        {
            MessageBox.Show(e.Source + "/n" + e.Message + "/n" + e.StackTrace);
            return null;
        }
    }

我想將組合框單元格添加到“帳戶狀態列”單元格，以將其更新為所選值（如果為空）。

希望我的問題清楚，有什么想法嗎？

Answer 1

要將DataTable綁定到DataGridView之前，請創建與您的特定列相對應的DataGridViewComboBoxColum並設置該列的DataPropertyName屬性。 通過綁定指定ComboBox項。

要在加載函數中插入的代碼：

DataGridViewComboBoxColumn cbcol = new DataGridViewComboBoxColumn ();
cbcol.Name             = "Account_Status" ;
cbcol.DataPropertyName = "Account Status" ; // DataTable column name
cbcol.DataSource       =  ...             ; // ComboBox DataSource
dataGridViewAP.Columns.Add(cbcol);
dataGridViewAP.DataSource = DBConn.getAdminInfo();