將復選框綁定到數據庫中的位字段 (AJAX)

Question

我有一個復選框，如果我的 gridview 中的條目已被“處理”（已處理意味着它已被用戶檢查），我想加載並檢查它。 我認為最好的方法是為每一行設置一個名為處理的字段，並在該行中包含一個復選框。 當用戶檢查它時，我希望它在數據庫中存儲一個 1。 另外，當它加載時，我希望該復選框根據數據庫中的該字段進行檢查或不加載。 我真的很難弄清楚如何將這兩個東西綁定在一起......我已經看過語法，但我不能完全知道發生了什么。 我也試過了，它似乎沒有存儲信息 - 因此，我認為我的 OnCheckedChanged 事件無法正常工作或根本無法正常工作。 有什么建議么？

CS

 public partial class vieworders : System.Web.UI.Page
{
    private string orderByString;
    private string fieldString;
    private string address;
    private DataGrid dataGrid = new DataGrid();


    protected void Page_Load(object sender, EventArgs e)
    {

         orderByString = orderByList.SelectedItem.Value;
         fieldString = searchTextBox.Text;
         string sqlStatement = "SELECT fName,lName,zip,email,cwaSource,price,length FROM SecureOrders WHERE fName LIKE '%" + fieldString + "%' OR lName LIKE'%" + fieldString + "%'  OR zip LIKE'%" + fieldString + "%' OR zip LIKE'%" + fieldString + "%'  OR email LIKE'%" + fieldString + "%' OR cwaSource LIKE'%" + fieldString + "%' OR length LIKE'%" + fieldString + "%' OR price LIKE'%" + fieldString + "%' ORDER BY " + orderByString;
            ////////////////////////////




            connectionString = rootWebConfig.ConnectionStrings.ConnectionStrings["secureodb"];

        //TEST
            for (int i = 0; i < DefaultGrid.Rows.Count; i++)
            {
                CheckBox chkUpdate = (CheckBox)DefaultGrid.Rows[i].Cells[1].FindControl("CheckBoxProcess");
                if (chkUpdate != null)
                {
                    OrderBrowser.Text += "Test";
                }
            }



            // Create an SqlConnection to the database.
            using (SqlConnection connection = new SqlConnection(connectionString.ToString()))
            {
                connection.Open();
                SqlDataAdapter dataAdapter = new SqlDataAdapter(sqlStatement, connection);


                // create an SqlCommandBuilder - this will automatically generate the
                // commands, and set the appropriate properties in the dataAdapter
                SqlCommandBuilder commandBuilder = new SqlCommandBuilder(dataAdapter);

                // create the DataSet
                DataSet dataSet = new DataSet();
                // fill the DataSet using our DataAdapter

                dataAdapter.Fill(dataSet, "SecureOrders");


                SqlCommand cmd = new SqlCommand("SELECT * FROM SecureOrders", connection);  // might not need this
                DataView source = new DataView(dataSet.Tables[0]);
                DefaultGrid.DataSource = source;
                DefaultGrid.DataBind();
            }


         }

    protected void DefaultGrid_SelectedIndexChanged(Object sender, EventArgs e)
    {
        GridViewRow row = DefaultGrid.SelectedRow;
        string name = "Name: " + row.Cells[2].Text + " " + row.Cells[3].Text + "\r\n";
       // if (row.Cells[4].Text == "&nbsp;")
        //{
            //address = "Address: " + row.Cells[3].Text + "\r\n         " + row.Cells[5].Text + ", " + row.Cells[6].Text + " " + row.Cells[7].Text + " " + row.Cells[8].Text + "\r\n";

       // }
        //else
       // {
           // address = "Address: " + row.Cells[3].Text + "\r\n         " + row.Cells[4].Text + "\r\n         " + row.Cells[5].Text + ", " + row.Cells[6].Text + " " + row.Cells[7].Text + " " + row.Cells[8].Text + "\r\n";
        //}

        string zip = "Zip: " + row.Cells[4].Text + "\r\n";
        string email = "Email: " + row.Cells[5].Text + "\r\n";
        //string phone = "Phone: " + row.Cells[10].Text + "\r\n";
        //string cctype = "Credit Card Type: " + row.Cells[11].Text + "\r\n";
        //string ccnum = "Credit Card Number: " + row.Cells[12].Text + "\r\n";
        //string ccexp = "Credit Card Expiration: " + row.Cells[13].Text + "\r\n";
        string length = "Length: " + row.Cells[8].Text + "\r\n";
        //string delivery = "Delivery: " + row.Cells[15].Text + "\r\n";
        string price = "Price: " + row.Cells[7].Text + "\r\n";
        string source = "Source: " + row.Cells[6].Text + "\r\n";
        //string joined = "Joined: " + row.Cells[18].Text + "\r\n";
        //string url = "URL: " + row.Cells[19].Text + "\r\n";

        OrderBrowser.Text = name + email + length + price + source;
    }

    protected void CheckBoxProcess_CheckedChanged(object sender, EventArgs e)
    {
        CheckBox cb = (CheckBox)sender;
        GridViewRow gr = (GridViewRow)cb.NamingContainer;
        if (cb.Checked)
        {
            OrderBrowser.Text = "checked";
        }
        else
        {
            OrderBrowser.Text = "unchecked";
        }

    }

    }

ASPX

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="vieworders.aspx.cs" Inherits="Cabot3.custserv.vieworders" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <asp:ScriptManager ID = "ScriptManager" runat="server" />
    <div>
        <div>
            <asp:Label runat="server" id = "orderByLabel" Text = "Order By: " />


            <asp:DropDownList runat="server" ID="orderByList" AutoPostBack="true">
                <asp:ListItem Value="fName" Selected="True">First Name</asp:ListItem>
                <asp:ListItem Value="lName">Last Name</asp:ListItem>
                <asp:ListItem Value="state">State</asp:ListItem>
                <asp:ListItem Value="zip">Zip Code</asp:ListItem>
                <asp:ListItem Value="cwaSource">Source</asp:ListItem>
                <asp:ListItem Value="cwaJoined">Date Joined</asp:ListItem>
            </asp:DropDownList>
        </div>
        <div>
            <asp:Label runat="server" ID="searchLabel" Text="Search For: " />
            <asp:TextBox ID="searchTextBox" runat="server" Columns="30" />
            <asp:Button ID="searchButton" runat="server" Text="Search" />
        </div>
    <div>
    <asp:UpdatePanel ID = "up" runat="server">



        <ContentTemplate>
        <div style= "overflow:auto; height:150px; width:700px">
        <asp:GridView ID="DefaultGrid" runat = "server" DataKeyNames = "fName, lName, zip"
        onselectedindexchanged = "DefaultGrid_SelectedIndexChanged"
        autogenerateselectbutton = "true"
        selectedindex="0">
        <SelectedRowStyle BackColor="Azure"
        forecolor="Black"
        font-bold="true" />
        <Columns>
        <asp:TemplateField HeaderText="Processed">
                    <ItemTemplate>
                        <asp:CheckBox ID="CheckBoxProcess" OnCheckedChanged="CheckBoxProcess_CheckedChanged"  AutoPostBack="true" runat="server" Enabled="true" />
                    </ItemTemplate>
                </asp:TemplateField>
        </Columns>
        </asp:GridView>
        </div>
        <asp:TextBox ID="OrderBrowser" columns="70" Rows="14" runat="server" Wrap="false" TextMode="MultiLine" ReadOnly = "true">
        </asp:TextBox>
        </ContentTemplate>
        </asp:UpdatePanel>



    </div>
    </form>
</body>
</html>

Answer 1

您可以綁定值...

 <ItemTemplate>
   <asp:CheckBox ID="CheckBoxProcess" OnCheckedChanged="CheckBoxProcess_CheckedChanged"  
             Checked='<%# Eval("FieldName") %>'  AutoPostBack="true" runat="server" Enabled="true" />
    </ItemTemplate>

其次更新 CheckBox Checked/UnChecked上的值，您可以使用 gridview 的RowCommand事件，您可以在其中更新 DB 中的字段。 例如

protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
    if (e.CommandName == "")
    {

    }
}