DataGrid Web Control 基本操作

dgCategory是用于显示类别表的DataGrid

自动分页: AllowPaging= TRUE!!!!

private void dgCategory_PageIndexChanged( object source, System.Web.UI.WebControls.DataGridPageChangedEventArgs e)

{

dgCategory.CurrentPageIndex=e.NewPageIndex;

dgCategory.DataBind();

}

排序:默认按“ PKId ”排序

private void dgCategory_SortCommand( object source, System.Web.UI.WebControls.DataGridSortCommandEventArgs e)

{

string SortOrder=e.SortExpression.ToString();

BindData(SortOrder);

}

private void BindData( string SortOrder)

{

ProductSystem productSys= new ProductSystem();//底层数据接口

CategoryData categorySet=productSys.GetCategories(1); //底层数据接口,返回ID为1的Category

DataView categoryView=categorySet.Tables[CategoryData.CATEGORIES_TABLE].DefaultView;

categoryView.Sort=SortOrder;

lblTitle.Text=" 按 "+SortOrder+" 排序 ";

dgCategory.DataSource=categoryView;

dgCategory.DataBind();

}

private void Page_Load( object sender, System.EventArgs e)

{

BindData("PKId");

}

编辑,更新,取消:

private void dgCategory_EditCommand( object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)

{

dgCategory.EditItemIndex=e.Item.ItemIndex;

BindData("PKId");

}

private void dgCategory_CancelCommand( object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)

{

dgCategory.EditItemIndex=-1;

BindData("PKId");

}

private void dgCategory_UpdateCommand( object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)

{

string strUpdate="";

strUpdate+="PKId='"+((TextBox)e.Item.Cells[1].Controls[0]).Text+"'";

strUpdate+="ParentId='"+((TextBox)e.Item.Cells[2].Controls[0]).Text+"'";

strUpdate+="Description='"+((TextBox)e.Item.Cells[3].Controls[0]).Text+"'";

strUpdate+="IsLeaf='"+((TextBox)e.Item.Cells[4].Controls[0]).Text+"'";

try

{

CagegorySet.ExecuteUpdate(strUpdate); // 需要后台提供更新的接口

dgCategory.EditItemIndex=-1;

}

catch

{

Response.Write("

1<script language="javascript">alert('  未能完成更新,请…………  ')</script>

");

}

BindData("PKId");

}

private void dgCategory_DeleteCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)

{

// 获得关键字 , 使用 DataKeys 集合访问数据列表控件中每个记录的键值(显示为一行)

// 使得用户可以存储键字段而无需在控件中显示它

string PKId=dgCategory.DataKeys[e.Item.ItemIndex];

CategorySet.ExecuteDelete(PKId);

}*/

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