- HeaderTemplateRowDataBound设置GirdView 的 DataKeyNames="Name" 即数据源中的字段，我设置的是：Name；
- 添加GridView事件： RowDataBound
- 在事件事首先判断行的类型是不是数据行；因为第一行通常是 HeaderTemplate;(图中的第一行就是表头，如编号，标识码，商品名称。。。。)
-
在当前行中查换DropDownList的Id; DropDownList ddlInType = e.Row.FindControl( " ddlInType " ) as DropDownList;
设置DropDownList的数据源及绑定的字段；
然后再取出当数据库中的值，与DataKeys绑定;(上面提到的 DataKeyNames="Name")
protected
void
gvInBillList_RowDataBound(
object
sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
DropDownList ddlInType = e.Row.FindControl( " ddlInType " ) as DropDownList;
ddlInType.DataSource = new InBillManager().GetDropDownList();
ddlInType.DataValueField = " Id " ;
ddlInType.DataTextField = " Name " ;
ddlInType.DataBind();
this .SelectDropDownList(ddlInType, this .gvInBillList.DataKeys[e.Row.RowIndex][ " Name " ].ToString());
}
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
DropDownList ddlInType = e.Row.FindControl( " ddlInType " ) as DropDownList;
ddlInType.DataSource = new InBillManager().GetDropDownList();
ddlInType.DataValueField = " Id " ;
ddlInType.DataTextField = " Name " ;
ddlInType.DataBind();
this .SelectDropDownList(ddlInType, this .gvInBillList.DataKeys[e.Row.RowIndex][ " Name " ].ToString());
}
}
public
void
SelectDropDownList(DropDownList objDropDownList,
string
valueOrText)
{
objDropDownList.ClearSelection();
ListItem objLI = objDropDownList.Items.FindByValue(valueOrText);
if (objLI == null )
{
objLI = objDropDownList.Items.FindByText(valueOrText);
}
if (objLI != null )
{
objDropDownList.ClearSelection();
objLI.Selected = true ;
}
{
objDropDownList.ClearSelection();
ListItem objLI = objDropDownList.Items.FindByValue(valueOrText);
if (objLI == null )
{
objLI = objDropDownList.Items.FindByText(valueOrText);
}
if (objLI != null )
{
objDropDownList.ClearSelection();
objLI.Selected = true ;
}
}
