Asp.net 在网格视图中搜索记录

读取记录已解决。我仍然有另一个问题，错误消息仍然保留在正确的顺序id的用户密钥之后

    query = "select FoodName, Qty, IngredientName, Quantity, OrderStatus 
             from tblorder, tblorderdetail, tblfood, tblcustomizefooddetail, tblcustomizeingredient, tblordercustomize 
             where tblOrder.OrderId = @OrderId and OrderStatus = @OrderStatus and tblorder.OrderId = tblorderdetail.OrderId and tblorderdetail.FoodId = tblfood.FoodId and tblorderdetail.OrderDetailId = tblordercustomize.OrderDetailId and tblfood.FoodId = tblcustomizefooddetail.FoodId and tblcustomizeingredient.IngredientId = tblcustomizefooddetail.IngredientId and tblordercustomize.IngredientId = tblcustomizeingredient.IngredientId"

    com = New MySqlCommand(query, conn)

    com.Parameters.AddWithValue("@OrderId", txtOrderId.Text)
    com.Parameters.AddWithValue("@OrderStatus", "Pending")

    Dim sqladapter As New MySqlDataAdapter(com)
    sqladapter.Fill(dt)

    If dt.Rows.Count Then
        GridView1.DataSource = dt
        GridView1.DataBind()
    Else
        Label1.Text = "Order ID Doesn't Exist"
    End If

---

让我们获取您的样本并对其进行修改：

query = "select FoodName, Qty, IngredientName, Quantity, OrderStatus 
             from tblorder, tblorderdetail, tblfood, tblcustomizefooddetail, tblcustomizeingredient, tblordercustomize 
             where tblOrder.OrderId = @OrderId and OrderStatus = @OrderStatus and tblorder.OrderId = tblorderdetail.OrderId and tblorderdetail.FoodId = tblfood.FoodId and tblorderdetail.OrderDetailId = tblordercustomize.OrderDetailId and tblfood.FoodId = tblcustomizefooddetail.FoodId and tblcustomizeingredient.IngredientId = tblcustomizefooddetail.IngredientId and tblordercustomize.IngredientId = tblcustomizeingredient.IngredientId"

    com = New MySqlCommand(query, conn)

    com.Parameters.AddWithValue("@OrderId", txtOrderId.Text)
    com.Parameters.AddWithValue("@OrderStatus", "Pending")

    Dim adapter as new SqlDataAdapter(com)
adapter.Fill(dt)

if adapter.Tables(0).Rows.Count > 0
        GridView1.DataSource = adapter.Tables(0)
        GridView1.DataBind()
    Else
        Label1.Text = "Order ID Doesn't Exist"
    End If

---

您已经在读取第一条记录，因此您将删除第一条记录。为什么不使用SqlDataAdapter并让它为您完成所有的艰苦工作呢？此外，我没有看到您关闭连接，但我怀疑这只是一段代码。可以举一些例子吗？我是新来的你说“只读第一条记录”-这是因为你做了

dr.read

-它读一条记录。然后执行

dt.Load（dr）

——它从第二条记录开始读取。一定要使用

sqldataadapter

，因为您的目标是获取

datatable

。有关示例，请访问MSDN。用谷歌搜索

.netsqldataadapter

，你就会在那里。