Question

我有两个与此问题相关的表格......

tblCellTechnology
  CellTechnologyID, PK
  Description
  CellName

tblActionSchedule
  ActionID, PK
  ActionPhase
  ActionPeriod
  CellTechnology, FK

我有一个批量编辑网格视图，其中的文本框显示ActionID，Phase，Period和直接链接到tblCellTechnology的CellTechnologyID的下拉列表（根据图像）。我还有另一个文本框，根据tblScheduleAction.CellTechnologyID中的值显示单元格名称（ActionDescription是从另一个表中提取的）。

如何从ddl中获取所选值并将其写入tblScheduleAction.CellTechnologyID？当我将CellTechnologyID硬添加到tblScheduleActionID时，cellname文本框会显示正确的值。我只需要能够将ddl.SelectedValue存储到tblScheduleAction.CellTechnologyID。我正在使用masterpages和sqldatasources来处理记录的插入/更新/删除。

我希望底部gridview中的celltechnologyid列显示潜在的celltechnologyid列表，因为它从顶部网格视图直接链接到该列，所选值也应存储在tblScheduleAction.CellTechnologyID中。 cellname列应显示相应的cellname。正如他们所说，一张图片胜过千言万语...... http://imgur.com/21FjOzh

Answer 1

通过嵌套的网格视图，我假设您在每个父网格视图行中引用子网格视图。获取子gridview控件的值非常简单。

如何从ddl中获取所选值并将其写入tblScheduleAction.CellTechnologyID？

您使用FindControl查找保存记录中的foreach循环中的childgridview
然后，您将使用查找控件来查找下拉列表＆amp;保存到您的数据库

检查工作示例（Aspx）

    <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="NestedGridviews.aspx.cs" Inherits="WebApplication1.NestedGridviews" %>
<!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">
    <div>

        <asp:GridView ID="gvParent" runat="server" AutoGenerateColumns="False" 
            DataKeyNames="CategoryID" DataSourceID="sdsParentGrid" 
            onrowdatabound="GridView1_RowDataBound">
            <Columns>
                <asp:BoundField DataField="CategoryID" HeaderText="CategoryID" 
                    InsertVisible="False" ReadOnly="True" SortExpression="CategoryID" />
                <asp:BoundField DataField="CategoryName" HeaderText="CategoryName" 
                    SortExpression="CategoryName" />
                <asp:BoundField DataField="Description" HeaderText="Description" 
                    SortExpression="Description" />
                <asp:TemplateField>
                    <ItemTemplate>
                        <asp:GridView ID="gvChildGrid" runat="server" AutoGenerateColumns="False" 
                            DataKeyNames="ProductID" DataSourceID="sdsChildGrid">
                            <Columns>
                                <asp:BoundField DataField="ProductID" HeaderText="ProductID" 
                                    InsertVisible="False" ReadOnly="True" SortExpression="ProductID" />
                                <asp:BoundField DataField="ProductName" HeaderText="ProductName" 
                                    SortExpression="ProductName" />
                                <asp:BoundField DataField="SupplierID" HeaderText="SupplierID" 
                                    SortExpression="SupplierID" />
                                <asp:BoundField DataField="CategoryID" HeaderText="CategoryID" 
                                    SortExpression="CategoryID" />
                                <asp:CheckBoxField DataField="Discontinued" HeaderText="Discontinued" 
                                    SortExpression="Discontinued" />
                                <asp:TemplateField HeaderText="My DropDown Column">
                                    <ItemTemplate>
                                        <asp:DropDownList ID="ddlTest" runat="server">
                                            <asp:ListItem>Potatoes</asp:ListItem>
                                            <asp:ListItem>Tomatoes</asp:ListItem>
                                            <asp:ListItem>Mangoes</asp:ListItem>
                                        </asp:DropDownList>
                                    </ItemTemplate>
                                </asp:TemplateField>
                            </Columns>
                        </asp:GridView>
                        <asp:SqlDataSource ID="sdsChildGrid" runat="server" 
                            ConnectionString="<%$ ConnectionStrings:NorthwindConnectionString %>" 
                            SelectCommand="SELECT [ProductID], [ProductName], [SupplierID], [CategoryID], [Discontinued] FROM [Alphabetical list of products] WHERE ([CategoryID] = @CategoryID)">
                            <SelectParameters>
                                <asp:Parameter Name="CategoryID" Type="Int32" />
                            </SelectParameters>
                        </asp:SqlDataSource>
                    </ItemTemplate>
                </asp:TemplateField>
            </Columns>
        </asp:GridView>
        <asp:SqlDataSource ID="sdsParentGrid" runat="server" 
            ConnectionString="<%$ ConnectionStrings:NorthwindConnectionString %>" 
            SelectCommand="SELECT [CategoryID], [CategoryName], [Description] FROM [Categories] ORDER BY [CategoryName]">
        </asp:SqlDataSource>

    </div>
    <asp:Button ID="btnSave" runat="server" onclick="btnSave_Click" 
        Text="Save to Database" />
    </form>
</body>
</html>

代码隐藏

    using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace WebApplication1
{
    public partial class NestedGridviews : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
        {
            if (e.Row.RowType == DataControlRowType.DataRow)
            {
                GridView gvChild = e.Row.FindControl("gvChildGrid") as GridView;
                SqlDataSource sdsTemp = e.Row.FindControl("sdsChildGrid") as SqlDataSource;
                if (sdsTemp!=null)
                {
                    sdsTemp.SelectParameters[0].DefaultValue = gvParent.DataKeys[e.Row.RowIndex]["CategoryID"].ToString();
                    if (gvChild != null)
                    {
                        gvChild.DataBind();
                    }
                }
            }
        }

        protected void btnSave_Click(object sender, EventArgs e)
        {
            foreach (GridViewRow growParent in gvParent.Rows)
            {
                // Find child gridview for each row
                GridView gvChild = growParent.FindControl("gvChildGrid") as GridView;
                if (gvChild != null)
                {
                    // use a foreach loop to find your control
                    foreach (GridViewRow growChild in gvChild.Rows)
                    {
                        DropDownList ddlTemp = growChild.FindControl("ddlTest") as DropDownList;
                        if (ddlTemp != null)
                        {
                            Response.Write(ddlTemp.SelectedValue.ToString());
                        }
                    }
                }
            }
        }
    }
}

enter image description here

将gridview嵌套的dropdown.selectedValue添加到数据库

1 个答案: