我想記錄的1天到30天的查詢是在SQL工作正常一天到30天C#
SELECT * FROM Tbl_order WHERE date >= DATEADD(day, -1, GETDATE())
所以我在C#
沒有我使用組合框中選擇記錄
int CmboDays;
for (CmboDays = -1; CmboDays >= -30; CmboDays--)
{
comboBox1.Items.Add(CmboDays);
}
private void orderBySearchDays()
{
string c = comboBox1.Text;
int x = Convert.ToInt32(c);
using (connection = new SqlConnection(connectionString))
using (SqlDataAdapter adapter = new SqlDataAdapter("select* from Tbl_order WHERE date >= DATEADD(day,'"+ x + "', GETDATE()) ; ", connection))
{
DataTable Tbl_order = new DataTable();
connection.Open(); //opens the connection
adapter.Fill(Tbl_order);
connection.Close(); //Closes the connection
lst_CustomerNo.DataSource = Tbl_order; //assigns a datasource
lst_CustomerNo.DisplayMember = "CustomerNo"; //assigns display
lst_CustomerNo.ValueMember = "CustomerNo";
lst_OrderName.DataSource = Tbl_order;
lst_OrderName.DisplayMember = "OrderName";
lst_OrderName.ValueMember = "OrderName";
lst_Quantity.DataSource = Tbl_order;
lst_Quantity.DisplayMember = "Quantity";
lst_Quantity.ValueMember = "Quantity";
lst_Price.DataSource = Tbl_order;
lst_Price.DisplayMember = "Price";
lst_Price.ValueMember = "Price";
lst_datetime.DataSource = Tbl_order;
lst_datetime.DisplayMember = "Date";
lst_datetime.ValueMember = "Date";
}
}
因此所有的數據將在列表框中顯示
我得到這個錯誤
System.Data.dll中發生未處理的「System.Data.SqlClient.SqlException」類型異常
附加信息:參數數據類型varchar對於dateadd函數的參數2無效。
我在做那個錯嗎? 如何解決錯誤?
使用的參數。不要使用輸入值查詢字符串。 –