如何在asp.net中的表单之间传递数据

Question

我有使用datalist 的表单并使用checkboxes 完成。如下所示

<asp:DataList ID="DataListTest" runat="server" OnPreRender="PreTes">
        <ItemTemplate>
    <table cellpadding="0" cellspacing="0">
        <tr>
        <td>
        <asp:Label ID="lblHeader" runat="server"></asp:Label>  <!-- Telephone, Bussines System -->                                    
        </td>

        </tr>
        <tr>
        <td>
        <asp:Label ID="lblsubheader" runat="server" /></td>    <!-- Oracle, EPM, CRM (Muncul di Form) -->
        </tr>

        <tr>
        <td>

        <asp:HiddenField ID="idJenisAccess" runat="server" Value='<%# Eval("id_jenis_access") %>' />
        <asp:HiddenField ID="subhd" runat="server" Value='<%# Eval("sub_jenis") %>' /> <!-- Oracle, EPM, CRM (nama sub jenis) --> 
        <asp:HiddenField ID="id_access" runat="server" Value='<%# Eval("id_access") %>' /><!-- Output = ACT5, ACBS1 -->
        <asp:HiddenField ID="hd" runat="server" Value='<%# Eval("nama_jenis") %>' /><!-- Output = Telephone, Bussines System -->
        <asp:HiddenField ID="hdstatus" runat="server" Value='<%# Eval("status") %>' /> <!-- Output = 1 or 0 -->
        </td>
        </tr>

        <tr>
        <td>
        <asp:CheckBox ID="cbCountryName" runat="server"  Text='<%# Eval("nama_access") %>' /> <!-- Output = Local, Handphone, Project -->
        <asp:TextBox ID="testme" runat="server" Text="" Visible="false" /> <!-- Output = Textbox for all -->            
       </td>
        </tr>

        <tr>
        <td><asp:Label ID="lblReason" runat="server" Visible="false" text="Reason : "/>
        <asp:TextBox ID="txtReason" runat="server" Visible="false" />    
        </td>                   
        </tr>

        <tr>
        <td>
        <asp:Label ID="lblDescription" runat="server" Visible="false" text="Description : "/>
        <asp:TextBox ID="txtDescription" runat="server" Text="" Visible="false" />
        </td>
        </tr>
   </table>
        </ItemTemplate>
    </asp:DataList>

表格后面的代码，从数据库中获取数据如下所示。

private void ShowDataList()
{
    conn.Open();
    string sql = "Select access.id_access as 'id_access', access.status as 'status' , access.nama_access, jenis_access.id_jenis_access as 'id_jenis_access' ,jenis_access.nama_jenis_access as 'nama_jenis', sub_jenis.nama_sub_jenis as 'sub_jenis',sub_jenis.id_sub_jenis "+
                 "FROM access LEFT JOIN detil_access ON access.id_access = detil_access.id_access "+
                 "LEFT JOIN jenis_access ON detil_access.id_jenis_access = jenis_access.id_jenis_access "+
                 "LEFT JOIN sub_jenis ON detil_access.id_sub_jenis = sub_jenis.id_sub_jenis "+
                 "ORDER BY jenis_access.nama_jenis_access";
    SqlCommand cmd = new SqlCommand(sql, conn);
    SqlDataAdapter adp = new SqlDataAdapter(cmd);
    dt = new DataTable();
    adp.Fill(dt);
    DataListTest.DataSource = dt;
    DataListTest.DataBind();
}

这是我的PreRender Datalist，我称之为PreTest。将数据显示为checkboxes也是我的代码。

protected void PreTes(object sender, EventArgs e)
{
    string temp = ""; 
    string subtemp ="";
    foreach (DataListItem item in DataListTest.Items)
    {
        Label objLabel = item.FindControl("lblHeader") as Label; /* Output = Telepon, Business System (nama jenis access) */
        Label subjenis = item.FindControl("lblsubheader") as Label; /* Output = Oracle, CRM, EPM (nama sub jenis access) */
        Label lblreason = (Label)item.FindControl("lblReason"); /* Output = Reason : (label reaseon) */
        Label lbldescription = (Label)item.FindControl("lblDescription"); /* Output = Description : (label Description) */
        TextBox txtOther = item.FindControl("testme") as TextBox; /* Output = textbox except reason and description */
        TextBox txtReason = item.FindControl("txtReason") as TextBox; /* Output = textbox on Reason */
        TextBox txtDescription = item.FindControl("txtDescription") as TextBox; /* Output = textbox on Description */
        CheckBox objName = item.FindControl("cbCountryName") as CheckBox; /* Output = Local, Internet, Email (nama access) */
        HiddenField objHD = item.FindControl("hd") as HiddenField; /* Output = Telpon, Business System (if deleted, nama jenis will be show up every single access name) */
        HiddenField subobjHD = item.FindControl("subhd") as HiddenField;
        HiddenField id_access = (HiddenField)item.FindControl("id_access");
        HiddenField id_jenis = (HiddenField)item.FindControl("idJenisAccess");
        HiddenField status = (HiddenField)item.FindControl("hdstatus");


        if (temp != objHD.Value)
        {                                                     
             if (objHD.Value=="Others" && id_access.Value == "ACT5")
             {
                 lblreason.Visible = true;
                 txtReason.Visible = true;
                 lbldescription.Visible = true;
                 txtDescription.Visible = true;
             }
             temp = objHD.Value;
             objLabel.Text = temp + "<br/>";
        }
        if (subtemp != subobjHD.Value)
        {
            subtemp = subobjHD.Value;
            subjenis.Text = subtemp+"<br/>";
        }
        if (status.Value == "1")
        {
            txtOther.Visible = true;                                
        }            
    }
}

毕竟，我想将表单中的数据保存到数据库中。我的意思是，在用户检查了一些复选框之后。我想全部插入数据库。这是我插入数据的代码

private void InsertActivationDetail()
{
    //Mengambil nilai idActivation
    int MaxActivationId = GetGenerateActivationID();
    //

    foreach (DataListItem objitem in DataListTest.Items)
    {

        /* To get data from the form , then insert into database */
        CheckBox cbCountryName = (CheckBox)objitem.FindControl("cbCountryName");
        HiddenField id_access = (HiddenField)objitem.FindControl("id_access");
        HiddenField id_jenis_access = (HiddenField)objitem.FindControl("idJenisAccess");
        TextBox txtOther = objitem.FindControl("testme") as TextBox;
        TextBox txtreason = objitem.FindControl("txtReason") as TextBox;
        TextBox txtdescription = objitem.FindControl("txtDescription") as TextBox;
        /* Get data end, then Inserting the data (below) */

        /*Check if datalist is null or not*/
        if (objitem !=null)
        {
            /*if not nul, then check the checkboxes, is null or not*/
            if (cbCountryName.Checked == true)
            {                    
                /*if not null, then insert the data */
                conn.Open();                    
                     sql = "INSERT INTO detil_activation (id_activation_access, id_jenis_access, id_access, " +
                          "keterangan, reason, description) " +
                          "VALUES ('" +
                          MaxActivationId + "', '"+ id_jenis_access.Value +"', '" + id_access.Value + "','"+
                          txtOther.Text +"','"+txtreason.Text+"','"+txtdescription.Text+"')";                    
                SqlCommand cmd = new SqlCommand(sql, conn);
                cmd.ExecuteNonQuery();                    
                conn.Close();
                /* Inserting data is done */ 
            }
        }            
    }       
}

我的问题是，

如何将用户选择的所有checkboxes 发送到另一个网络表单？

例子：

当用户选中一些复选框并单击提交时，我会将所有在 checkbox 上选中的数据（如 id_access 、 id_jenis 和文本框 (ID ="testme") 上的文本）插入到数据库中。

当用户单击按钮提交和单击提交按钮时，所有过程都将发生，我希望选中 checkboxes 的所有数据都显示在另一页上（页面名称 =“SendingActivation”）。

like "你选择：id_access id_jenis (enter) id_access id_jenis (enter) id_access id_jenis (和选择的数据一样多)。

仅供参考：我是这里的新手，也是 c# 编程，所以请逐步帮助我

Answer 1

他们有很多方法可以实现这一点；

• 应用程序变量
• 会话变量
• Response.Redirect
• Cookies
• 使用 POST 方法

应用程序变量

传球：

Application["id_access"] = "A0123";

访问：

string id_access = Application["id_access"].ToString();

会话变量

分配：

Session["id_access"] = "A0123";

阅读：

 string id_access =  Session["id_access"];

Response.Redirect

传球：

Response.Redirect("SendingActivation.aspx?id_access="A0123");

访问：

  string id_access = Request.QueryString["id_access"];

Cookies

传球：

HttpCookie id_access= new HttpCookie("Name");
id_access.Value="A0123"; 

访问：

string id_access= Request.Cookies["Name"].Value;

使用 POST 方法

传球：

在源页面button 控件中，在提交表单时发布值。将控件的PostBackUrl 属性设置为要发布ASP.NET 网页的页面的URL

访问：

string id_access= Request.Form["ControlID"];

Answer 2

像这样更改您的 InsertActivationDetail 方法。我创建了一个字符串，其中 MaxActivationId 将被保存我假设 MaxActivatinoId 将是唯一的，当您在数据库中插入数据时。在下一页您将收到此 id 作为查询字符串并从中获取数据基于 MaxActivation id 的数据库并将其显示在您的页面中。

private void InsertActivationDetail()
{
    //Mengambil nilai idActivation
    int MaxActivationId = GetGenerateActivationID();
    //
    string id = "";
    foreach (DataListItem objitem in DataListTest.Items)
    {

        /* To get data from the form , then insert into database */
        CheckBox cbCountryName = (CheckBox)objitem.FindControl("cbCountryName");
        HiddenField id_access = (HiddenField)objitem.FindControl("id_access");
        HiddenField id_jenis_access = (HiddenField)objitem.FindControl("idJenisAccess");
        TextBox txtOther = objitem.FindControl("testme") as TextBox;
        TextBox txtreason = objitem.FindControl("txtReason") as TextBox;
        TextBox txtdescription = objitem.FindControl("txtDescription") as TextBox;
        /* Get data end, then Inserting the data (below) */

        /*Check if datalist is null or not*/
        if (objitem != null)
        {
            /*if not nul, then check the checkboxes, is null or not*/
            if (cbCountryName.Checked == true)
            {
                /*if not null, then insert the data */
                conn.Open();
                sql = "INSERT INTO detil_activation (id_activation_access, id_jenis_access, id_access, " +
                     "keterangan, reason, description) " +
                     "VALUES ('" +
                     MaxActivationId + "', '" + id_jenis_access.Value + "', '" + id_access.Value + "','" +
                     txtOther.Text + "','" + txtreason.Text + "','" + txtdescription.Text + "')";
                SqlCommand cmd = new SqlCommand(sql, conn);
                cmd.ExecuteNonQuery();
                conn.Close();
                ids += MaxActivationId.ToString() + ",";
                /* Inserting data is done */
            }
        }
    }
    id = MaxActivationId.ToString();
    Response.Redirect("yourpage?maxID=" + id);
}