我如何訪問一個控件到一個類中？

Question

我在page.aspx中有一個Gridview。這個gridview我想作爲參數傳遞給class1.cs.的構造函數。任何人都可以打電話給我，這怎麼辦？

Answer 1

所以，你有一個網頁，一個GridView：

<asp:GridView runat="server" ID="gv1" AutoGenerateColumns="true"> 
</asp:GridView> 

<div> 
    This is where the count of rows of your GridView will be displayed: 
    <p> 
     <strong><asp:Label runat="server" ID="lCount" /></strong> 
    </p> 
</div> 

而且，在代碼隱藏你填充它是這樣的：

this.gv1.DataSource = FullName.GetDemoCollection(); //Just returns a List<string>; 
gv1.DataBind(); 

和你有另一個類GridViewRowCounter做一些事GridView，例如計算行：

public class GridViewRowCounter 
{ 
    private System.Web.UI.WebControls.GridView _gv; 

    public GridViewRowCounter(){} 

    public GridViewRowCounter(System.Web.UI.WebControls.GridView _GV){ 
     this._gv = _GV; 

    } 

    public int GetRowCount(){ 
     return _gv.Rows.Count; 
    } 

} 

所以，你的GridView傳遞給Gridviewcounter類，你可以這樣做：

public partial class PassingControls : System.Web.UI.Page 
{ 
    protected void Page_Load(object sender, EventArgs e) 
    { 
     //Bind the GridView 
     this.gv1.DataSource = FullName.GetDemoCollection();// 
     gv1.DataBind(); 

     //Pass Gridview reference to the GridVeiwRowCounter constructor. 
     GridViewRowCounter gvcounter = new GridViewRowCounter(this.gv1); 
     //Get the external class to return the rowcount from your GridView. 
     this.lCount.Text = gvcounter.GetRowCount().ToString(); 
    } 
} 

HTH。

我希望這是你問;-)