Asp.net 在GridView中设置dropdownlist的selectedvalue

我的Gridview中有一个dropdownlist，我正在将一个数据源绑定到Gridview

尽管所有记录都正确显示，但未选择下拉值

我该如何设置这样的设置

用于ASP.net中Gridview中的dropdownlist

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谢谢

您可以钩住网格视图的RowDataBound事件，找到控件并设置值

protected void gridview_RowDataBound(object sender, GridViewRowEventArgs e)
{

     var dropdownList = e.Row.FindControl("YOUR_DROP_DOWN") as DropDownList;
     dropdownList .SelectedIndex = SET_VALUE_HERE;

}

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从数据源设置DropDownList值应如下所示：

    protected void gridview_RowDataBound(object sender, GridViewRowEventArgs e)
    {
    if (e.Row.RowType == DataControlRowType.DataRow)
     {
        DropDownList ddlCountry = (DropDownList)e.Row.FindControl("ddlCountry");
        ddlCountry.SelectedValue = DataBinder.Eval(e.Row.DataItem, "Country").ToString();
     }
    }

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受保护的子GridView1_RowDataBound（ByVal sender作为对象，ByVal e作为System.Web.UI.WebControl.GridViewRowEventArgs）处理GridView1.RowDataBound Dim dl作为DropDownList=CType（e.Row.FindControl（“ddlDecision”），DropDownList）Dim atviolPK作为TextBox=CType（e.Row.FindControl（“txtViolationPK”），TextBox）dl.SelectedValue=GetDecisionCode（atviolPK.Text）End Sub出于某种原因，dl和actviolPK都显示为nothing。请帮忙