以編程方式將非數據綁定列添加到gridview

Question

我想在page_load上添加一列到gridview上（）

它是我想要添加的標籤。我的數據源有ID ..但我不想顯示ID，我必須在我的對象模型中查找ID並用名稱替換它。

所以，我需要一個標籤，就像這樣：

<asp:Label ID="1234" runat="server" OnDataBinding="BindName" /> 

這是什麼我在ASCX文件做..裏面的TemplateField。

我想以編程方式在代碼中做同樣的事情。

任何想法？

Answer 1

您需要創建一個實現該了Itemplate接口的類。

public class TemplateImplementation : ITemplate 
{ 
    public void InstantiateIn(Control container) 
    { 
     Label label = new Label(); 
     label.DataBinding += Label_DataBinding; 
     container.Controls.Add(label); 
    } 
    void Label_DataBinding(object sender, EventArgs e) 
    { 
     Label label = (Label)sender; 
     object dataItem = DataBinder.GetDataItem(label.NamingContainer); 
     string sName = /* Lookup your name using the dataitem here here */; 
     label.Text = sName; 
    } 
} 

然後創建一個TemplateColumn中和你的ItemTemplate設置爲這個類的一個實例。

TemplateColumn lblColumn = new TemplateColumn(); 
lblColumn.ItemTemplate = as; 
grdMyGrid.Columns.Add(lblColumn); 

Answer 2

GridView有一個名爲RowDataBound的事件。使用它。在您的標記中爲此列添加TemplateColumn。在RowDataBound事件，做這樣的事情（如原油）：

 Private Sub GridView1_OnRowDataBound(ByVal sender as Object, ByVal e as EventArgs) 
      If e.Row.RowType = DataControlRowType.DataRow Then 
       'in this example the column in question is the 3rd column 
       'unless you are doing some javascript or some css on the label, I would 
       'recommend using a literal and not label. This is presuming there is no    
       'label or literal control in the ItemTemplate property of the TemplateColumn 
       Dim lt as New Literal 
       lt.Text = NameController.GetName(e.Row.DataItem("NameID")) 'your business logic layer goes here 
       e.Row.Cells(2).Controls.Add(lt) 
      End If 
     End Sub 

In addition, here is a link that may help you further:

Answer 3

ASPX來源

<asp:GridView ID="sampleGridView" Runat="server" DataSourceID="sampleDataSource"> 
    <Columns> 
    <asp:TemplateField HeaderText="Territories"> 
     <ItemTemplate> 
    <asp:Label ID="1234" runat="server"/> 
     </ItemTemplate> 
     </asp:TemplateField> 
     <asp:BoundField HeaderText="FirstName" DataField="FirstName" 
      SortExpression="FirstName"></asp:BoundField> 
     <asp:BoundField HeaderText="LastName" DataField="LastName" 
      SortExpression="LastName"></asp:BoundField> 
</Columns> 

C＃代碼

void sampleGridView_RowDataBound(object sender, GridViewRowEventArgs e) 
{ 
    if (e.Row.RowType == DataControlRowType.DataRow) 
    { 
    Label bl = (Label)e.Row.FindControl("1234"); 
    bl.Text= ((DataRowView) e.Row.DataItem)["ID"].ToString(); 
    } 
}