ntulp

Asp.Net 十幾行程式碼搞定 Master-Detail GridView(內含子 GridView)

分類：Asp.Net

一直都只有找到VB版  , 能力有限 , 修改不了

找這這篇C#版,好實用忍不住要把他記下來 ... 原文出處

步驟1.創造兩個GridView+SqlDataSource

步驟2.GridView1 的 RowDataBound 事件撰寫下面

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if ((e.Row.RowState & DataControlRowState.Selected) == DataControlRowState.Selected)
      {
        GridViewRow oRow = new GridViewRow(0, -1, DataControlRowType.DataRow, e.Row.RowState);
        GridView2.Visible = true;
        GridView2.DataBind();
        string sHTML = ControlToHTML(GridView2);
        GridView2.Visible = false;
        TableCell oCell = new TableCell();
        oCell.Text = sHTML;
        oCell.ColumnSpan = e.Row.Cells.Count;
        oRow.Cells.Add(oCell);
        e.Row.Parent.Controls.AddAt(e.Row.RowIndex + 2, oRow);
    }
}

 

步驟3加入兩段小小程式碼 不然不會動

private string ControlToHTML(System.Web.UI.Control Control)
{
    string sHTML = string.Empty;
    StringWriter oTextWriter = new StringWriter();
    HtmlTextWriter oHtmlWriter = new HtmlTextWriter(oTextWriter);
    
    Control.RenderControl(oHtmlWriter);
    sHTML = Convert.ToString(oTextWriter);
    return sHTML;
}
 
 
public override void VerifyRenderingInServerForm(Control control)
{}

 

步驟4.在原始檔部分設定一下屬性
設定 GridView1的 EnableViewState="False"
設定 GridView2的 EnableViewState="False"，且設定 Visible="False"
Page 的 EnableEventValidation="false"
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default6.aspx.cs" Inherits="Default6" EnableEventValidation="false" %>