大家都知道datagrid是一个使用频率很高的控件，在编写ASP.NET代码的时候，我们总希望能让用户选中指定的行以后，让那一行用不同的颜色显示，虽然datagrid样式也有这个功能，但是我们如何编写代码实现呢？
在本例子中，我们首先动态产生1000行，然后当用户选中datagrid中的某一行的时候，那一行就会变为蓝色。代码如下：
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
namespace WebApplication_rd
{
/// <summary>
/// Demostrates how to have a datagrid server control be bookmarked
/// </summary>
public class datagrid : System.Web.UI.Page
{
protected System.Web.UI.WebControls.DataGrid DGProducts;
int bookmarkIndex = 0; // The index of the row that should be scrolled to
int itemCount = 0; // Counter for the amount of items on the page
bool bookMark = true; // Controls whether or not the page is bookmarked
#region DGProducts EventHandlers
private void DGProducts_ItemDataBound(object source, DataGridItemEventArgs e) {
if (bookMark) {
LiteralControl anchor = new LiteralControl();
anchor.Text = "<a name=\"" + itemCount.ToString() + "\">";
itemCount ++;
e.Item.Cells[0].Controls.Add(anchor);
}
}
private void DGProducts_ItemCommand(object source, DataGridCommandEventArgs e) {
if (e.CommandName == "Select") {
e.Item.BackColor = Color.Blue;
if (bookMark) {
bookmarkIndex = e.Item.ItemIndex;
this.InsertScriptBlock();
}
}
}
#endregion
#region EventHandlers
private void Page_Load(object sender, System.EventArgs e)
{
this.Bind();
}
#endregion
#region User Defined
private void InsertScriptBlock() {
System.Text.StringBuilder jScript = new System.Text.StringBuilder();
jScript.Append("<script language=\"JavaScript\">");
jScript.Append("location.href=\"#");
jScript.Append(this.bookmarkIndex.ToString());
jScript.Append("\";");
jScript.Append("</script>");
this.RegisterClientScriptBlock("Bookmark", jScript.ToString());
}
private void Bind()
{
DGProducts.DataSource = this.CreateDataSource(1000);
DGProducts.DataBind();
}
private DataTable CreateDataSource(int count) {
DataTable table = new DataTable();
DataColumn column = null;
DataRow row = null;
// Create 5 columns
for (int iCol = 0; iCol < 5; iCol++) {
column = new DataColumn("Column: " + iCol.ToString(), typeof(string));
table.Columns.Add(column);
}
//Create Rows based on count variable
for (int iRows = 0; iRows < count; iRows ++) {
row = table.NewRow();
for (int iCol = 0; iCol < 5; iCol ++) {
row[iCol] = "Value: " + iCol.ToString();
}
table.Rows.Add(row);
}
return table;
}
#endregion
#region Web Form Designer generated code
override protected void OnInit(EventArgs e)
{
InitializeComponent();
base.OnInit(e);
}
private void InitializeComponent()
{
this.DGProducts.ItemCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.DGProducts_ItemCommand);
this.DGProducts.ItemDataBound += new System.Web.UI.WebControls.DataGridItemEventHandler(this.DGProducts_ItemDataBound);
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
}
}
