怎样设定gridview 的EditItemTemplate中dropdownlist的某一项被选定？

Question

怎样设定gridview 的EditItemTemplate中dropdownlist的某一项被选定？
  <asp:TemplateField HeaderText="Department">
                    <ItemTemplate>
                        <asp:Label ID="Label2" runat="server" Text='<%# Eval("department") %>'></asp:Label>
                    </ItemTemplate>
                    <EditItemTemplate>
                        <asp:DropDownList ID="DropDownList2" runat="server" DataSource="<%# ddlDepartmentBind() %>" DataTextField="deptname" DataValueField="deptname" >
                        </asp:DropDownList>
                    </EditItemTemplate>
直接这样，每次点编辑的时候默认选定项都为第一项，如何才能重新设定它对应的默认选定项啊？

Answer 1

你是说类似这样？
<asp:DropDownList SelectedValue='<%# Bind("departmentId") %>' ... >

Answer 2

RowBound 事件中if(e.Row.RowState == DataControlRowState.Edit){
DropDownList drp = e.Row.FindControl("DropDownList2");
// 
drp.SelectedValue = DataBinder.Eval(e.Row.DataItem, "department").ToString();
}

Answer 3

 <asp:TemplateField HeaderText="Department"> 
    <ItemTemplate> 
        <asp:Label ID="Label2" runat="server" Text=' <%# Eval("department") %>'> </asp:Label> 
    </ItemTemplate> 
    <EditItemTemplate> 
        <asp:DropDownList ID="DropDownList2" runat="server" DataSource=" <%# ddlDepartmentBind() %>" DataTextField="deptname" DataValueField="deptname" SelectedValue='<%# Bind("deptname") %>'> 
        </asp:DropDownList> 
    </EditItemTemplate> 
</asp:TemplateField>

Answer 4

SelectedValue=' <%# Bind("deptname") %>'

Answer 5

DropDownList1.Items.FindByText(你要选中的值).selected=true
DropDownList1.Items.FindByvalue(你要选中的值).selected=true
上面各位说的都行，我这个也行，就看个人的习惯

Answer 6

rowdataBound 事件中 if(e.Row.RowState == DataControlRowState.Edit){ 
DropDownList drp = e.Row.FindControl("DropDownList2"); 
// 
drp.SelectedValue = DataBinder.Eval(e.Row.DataItem, "department").ToString(); 
} 
为什么，偶数行记录就无效啊,默认选定项仍然为第一项目.?????????????????

Answer 7

rowdataBound 事件中 
加上这句
drp.SelectedValue = ((Label)e.Row.FindControl("Label2")).Text;

Answer 8

这样当然会报错哦。 DataControlRowState为 edit

Answer 9

rowdatabound 难道只对偶数行记录有效吗？

Answer 10

rowdatabound 难道只对奇数行记录有效吗？

Answer 11

GridView1_RowDataBound:
if (((DropDownList)e.Row.FindControl("DDLXueli")) != null)
        {
            DropDownList ddlxueli = (DropDownList)e.Row.FindControl("DDLXueli");            //  生成 DropDownList 的值，绑定数据
            string connStr = System.Configuration.ConfigurationSettings.AppSettings["lj"];
            string SqlStr = "SELECT * from xueli";
            DataSet ds = new DataSet();            SqlConnection conn = new SqlConnection(connStr);
            if (conn.State.ToString() == "Closed") conn.Open();
            SqlDataAdapter da = new SqlDataAdapter(SqlStr, conn);
            da.Fill(ds, "xueli");
            if (conn.State.ToString() == "Open") conn.Close();            ddlxueli.DataSource = ds.Tables[0].DefaultView;
            ddlxueli.DataTextField = "description";
            ddlxueli.DataValueField = "code";
            ddlxueli.DataBind();
            //            //  选中 DropDownList
            ddlxueli.SelectedValue = ((HiddenField)e.Row.FindControl("HDFXueli")).Value;
            //
        }页面：
<asp:TemplateField HeaderText="学历">
                                    <ItemTemplate>
                                        <%# Eval("description")%>
                                    </ItemTemplate>
                                    <EditItemTemplate>
                                        <asp:HiddenField ID="HDFXueli" runat="server" Value='<%# Eval("xueli") %>' />
                                        <asp:DropDownList ID="DDLXueli" runat="server" Width="90px" />
                                    </EditItemTemplate>
                                    <ItemStyle Width="100px" />
                                </asp:TemplateField>

Answer 12

我顶它个肺 ，为什么
 SelectedValue='<%# Bind("department") %>'> 这样就可以完全实现。而，在rowdatabound中
  if(e.Row.RowState == DataControlRowState.Edit)
{ 
DropDownList drp = e.Row.FindControl("DropDownList2"); 
// 
drp.SelectedValue = DataBinder.Eval(e.Row.DataItem, "department").ToString(); 
} 
这样写就不行呢。rowdatabound事件只能对 奇数行记录有效吗？ ？？

Answer 13

在rowdatabound 中怎么不行啊？

Answer 14

这么没有毅力啊,居然结贴了,不知解决了没有,我的解决方案:不设selectedvalue值,
在DropDownList的第一个位置上添加要作为selectedvalue的值就可以实现你的功能了
c#代码:
if ((e.Row.RowState & DataControlRowState.Edit) == DataControlRowState.Edit)
        {
            DropDownList ddl = (DropDownList)e.Row.FindControl("ddlzc");
            //ddl.SelectedValue = DataBinder.Eval(e.Row.DataItem, "zname").ToString();
            string temp = DataBinder.Eval(e.Row.DataItem, "zname").ToString(); 
            string sqlText = "select * from zhicheng";
            OleDbConnection conn = getCon();
            OleDbDataAdapter da = new OleDbDataAdapter(sqlText, conn);
            DataSet ds = new DataSet();
            conn.Open();
            da.Fill(ds, "zhicheng");
            //在0位置添加想要的值
            ds.Tables[0].Rows.Add(new object[] { 0, temp });
            DataView dv = ds.Tables[0].DefaultView;
            //ViewState["docstr"] = ds.Tables[0].Rows[0]["dname"].ToString();        
            dv.Sort = "zid";
            ddl.DataSource = dv;
            ddl.DataValueField = "zid";
            ddl.DataTextField = "zname";
            ddl.DataBind();            
            conn.Close();
            conn.Dispose();
        }

Answer 15

偶数行的问题是因为
if(e.Row.RowState == DataControlRowState.Edit)
这个判断有问题，e.Row.RowState 是DataControlRowState 值的按位组合，偶数行的状态是：DataControlRowState.Edit|DataControlRowState.Alternate
改成下面这个表达式来判断就可以了
if ((e.Row.RowState & DataControlRowState.Edit) > 0)