gridview中Combox如何定默值
在gridview中有combox控件，但combox中的值根前行的值哪一。

C# code

protected void gv_EmpInfor_RowDataBound(object sender, GridViewRowEventArgs e)    {        if (e.Row.RowType == DataControlRowType.DataRow)        {            if (e.Row.RowState == DataControlRowState.Alternate || e.Row.RowState == DataControlRowState.Normal)            {                GridViewRow drv = e.Row;                //首部的代                string sparentcode = ((System.Data.DataRowView)(drv.DataItem)).Row.ItemArray[9].ToString();                //首部的                 string sPartDeptcode = ((System.Data.DataRowView)(drv.DataItem)).Row.ItemArray[10].ToString();                //位表中的位                string stechcode = ((System.Data.DataRowView)(drv.DataItem)).Row.ItemArray[8].ToString();                //工表中的架位代                string sEmpTechcode = ((System.Data.DataRowView)(drv.DataItem)).Row.ItemArray[6].ToString();                //如果工表中架位代空自定初始部，子部，位并生成。                //首部控件                Control control = e.Row.FindControl("rcb_ParentDept");                if (control != null)                {                    DropDownList rcb_firstdept = control as DropDownList;                    rcb_firstdept.DataSource = GetParentDept();                                        rcb_firstdept.DataTextField = "departmentname";                    rcb_firstdept.DataValueField = "PartDeptCode";                    rcb_firstdept.DataBind();                    rcb_firstdept.Items.Insert(0, new ListItem("", "-1"));                   // rcb_firstdept.SelectedItem.Text = "集";                    rcb_firstdept.Attributes.Add("RowIndex", e.Row.RowIndex.ToString());                    if (sEmpTechcode == string.Empty)                    {//此是-----我置了值可示的值是“”                        rcb_firstdept.SelectedItem.Value = "00002$FA";// sparentcode + "$" + sPartDeptcode;                       // rcb_firstdept.SelectedIndex = rcb_firstdept.Items.IndexOf(new ListItem("生部"));                    }                }                //子部控件                Control control1 = e.Row.FindControl("rcb_SubDept");                if (control != null)                {                    DropDownList rcb_subDept = control1 as DropDownList;                    rcb_subDept.Attributes.Add("RowIndex", e.Row.RowIndex.ToString());                }                //位列表控件                Control control2 = e.Row.FindControl("rcb_Technical");                if (control != null)                {                    DropDownList rcb_tchnical = control2 as DropDownList;                    rcb_tchnical.Attributes.Add("RowIndex", e.Row.RowIndex.ToString());                }            }        }    }

//此是-----我置了值可示的值是“”

[解决办法]
你把默认值 外面加一个判断，如果已有选择就不让它走你的默认值了！ 否则，程序每走到这，都会给那个下拉值赋成 “请选择”