GridView 与 DropDownList 结合问题，纯后台编码

Question

本帖最后由 silence1203 于 2011-02-17 16:59:17 编辑

Answer 1

动态模版列使用ITemplate
或
protected void gv_RowEditing(object sender, GridViewEditEventArgs e)
{
gv.EditIndex = e.NewEditIndex;
BindData();
}
protected void gv_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
gv.EditIndex = e.RowIndex;
int id = int.Parse(gv.DataKeys(e.RowIndex).Value.ToString());
string str = ((DropDownList)gv.Rows(e.RowIndex).FindControl("ddl")).SelectedValue.Trim();
}

Answer 2

替换原理 
前台<Columns>
                <asp:BoundField DataField="RoomsName" HeaderText="房间名称" 
                    SortExpression="RoomsName" ReadOnly="true" />
                <asp:TemplateField HeaderText="1号">
                    <ItemTemplate>
                        <%# Eval("num1")%></ItemTemplate> 
                    <EditItemTemplate>
                        <asp:DropDownList ID="DropDownList1" runat="server" DataSourceID="AccessDataSource"
                            DataTextField="id" DataValueField="id">
                        </asp:DropDownList>
                        
                    </EditItemTemplate>
                </asp:TemplateField>
<asp:AccessDataSource ID="AccessDataSource" runat="server" DataFile="~/App_Data/3YQ.mdb"
                            SelectCommand="SELECT distinct [id] FROM [ttue]"> //替换查询出的字段
                            </asp:AccessDataSource>
            </Columns>
后台
前提 以绑定数据
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        //num1
        if((e.Row.RowState == DataControlRowState.Edit) || (e.Row.RowState == (DataControlRowState.Alternate | DataControlRowState.Edit)))
        {
            System.Data.DataRowView drv = (System.Data.DataRowView)e.Row.DataItem;
            DropDownList ddl =  (DropDownList)e.Row.Cells[3].FindControl("DropDownList1");
            ListItem li = ddl.Items.FindByText(drv["num1"].ToString());
            li.Selected = true;
        }
}
protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
    {
        GridViewRow gvr = this.GridView1.Rows[this.GridView1.EditIndex];
        //num1
        DropDownList ddl = (DropDownList)gvr.Cells[3].FindControl("DropDownList1");
        e.NewValues["num1"] = ddl.SelectedValue;
}