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如何从button_click的GridView中的多个DropDownList中获取值?

[英]How to get values from multiple DropDownLists in a GridView on button_click?

我在asp.net网络表单上有一个GridView ,所有列和行都是从后面用C#代码创建的。 除了第一列之外,每列中的每个单元格都是一个具有DataSourceDropDownList

这是我的GridView

 <asp:GridView ID="gv_Rota" runat="server" AutoGenerateColumns="false" OnRowDataBound="gv_Rota_RowDataBound">
                     <HeaderStyle BackColor="#6a3d98" ForeColor="White" Height="20" />
                     <RowStyle HorizontalAlign="Center" Height="20px" Width="100px" />
                     <AlternatingRowStyle Height="20px" />
                 </asp:GridView>

以及列和单元格的c#创建:

 private void BindGrid(int Amount)
    {
        gv_Rota.DataSource = null;
        gv_Rota.Columns.Clear();

        BoundField bfield = new BoundField();
        bfield.HeaderText = "Days";
        bfield.DataField = "Days";
        gv_Rota.Columns.Add(bfield);

        for (int i = 0; i < Amount; i++)
        {
            int week = i + 1;
            string sWeek = "Week " + week.ToString();

            TemplateField tfield = new TemplateField();
            tfield.HeaderText = sWeek;
            gv_Rota.Columns.Add(tfield);
        }

        DataTable dt = new DataTable();
        dt.Columns.Add(new DataColumn("Days", typeof(string)));
        dt.Rows.Add("M");
        dt.Rows.Add("T");
        dt.Rows.Add("W");
        dt.Rows.Add("T");
        dt.Rows.Add("F");
        dt.Rows.Add("S");
        dt.Rows.Add("S");
        gv_Rota.DataSource = dt;
        gv_Rota.DataBind();
    }

然后在GridViewRowDataBound触发器上,将DropDownList控件添加到每个单元格:

protected void gv_Rota_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        for (int i = 1; i <= ColumnCount; i++)
        {
            if (e.Row.RowType == DataControlRowType.DataRow)
            {
                ddlShift = new DropDownList();
                ddlShift.ID = "ddlShift";
                ddlShift.DataSource = DCListOfShifts;
                ddlShift.DataValueField = "SHIFT_ID";
                ddlShift.DataTextField = "SHIFT_NAME";
                ddlShift.DataBind();
                ddlShift.Items.Insert(0, new ListItem("Shift..."));
                ddlShift.CssClass = "ddl_rotamanager";
                e.Row.Cells[i].Controls.Add(ddlShift);
            }
        }  
    }

例如在我的页面上显示的内容:

在此处输入图片说明

所以我的问题是,我现在想将每列(第一列除外)保存到数据库中,作为“预定的一周”,并且不知道如何将所有或任何DropDownLists的选定项目的值然后将其传递回数据库。 切记,这不是对selectedindexchanged完成的。 我将从所有DropDownLists选择项目,然后按一个按钮提交值。 请有人给我一些如何完成的重点吗? 谢谢。

编辑1:响应说明了如何获取行或单个单元格中DropDownList的每个值。 但是,现在我需要更具体地了解如何获取而不是行中特定单元格的值。 是否有可能对此进一步强调?

使用Gridview.Rows属性

protected void MyButton_Click(object sender, EventArgs e)
{
    foreach(GridViewRow row in gv_Rota.Rows)
    {
       //find this control in this row
       DropDownList dd = row.FindControl("MyDropdown") as DropDownList;

       //OR
       //find this control in a specific cell
       DropDownList day = row.Cells[0].FindControl("MyDropdown") as DropDownList;
       DropDownList Week1 = row.Cells[1].FindControl("ddShift") as DropDownList;

       //this is just a pseudo-code to determine which dropdown was selected per row. 
       //You can improve on this
       if(dd1.SelectedValue != string.Empty)
         thisDay.SelectedWeek = dd1.SelectedValue;
       else if(dd2.SelectedValue != string.Empty)
         thisDay.SelectedWeek = dd2.SelectedValue;
       ....
    }
}

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