GridView行編輯、更新、取消、刪除事件用法
注意：當啟用編輯按鈕時，點選編輯按鈕後會使一整行都切換成文字框。為了是一行中的一部分是文字框，需要把以整行的所有列都轉換成模板，然後刪掉編輯模板中的程式碼。這樣就能使你想編輯的列轉換成文字框。
1.介面
<asp:GridView ID="GridView1" runat="server" CellPadding="4" ForeColor="#333333"
GridLines="None" AutoGenerateColumns="False" DataKeyNames="ProductID"
onrowdatabound="GridView1_RowDataBound" AllowPaging="True"
onpageindexchanging="GridView1_PageIndexChanging"
onrowcommand="GridView1_RowCommand"
onrowcancelingedit="GridView1_RowCancelingEdit"
onrowediting="GridView1_RowEditing" onrowupdating="GridView1_RowUpdating"
onrowdeleting="GridView1_RowDeleting">
<PagerSettings FirstPageText="首頁" LastPageText="尾頁"
Mode="NextPreviousFirstLast" NextPageText="下一頁" PreviousPageText="上一頁" />
<RowStyle BackColor="#E3EAEB" />
<Columns>
<asp:TemplateField HeaderText="ProductID">
<ItemTemplate>
<asp:Label ID="Label2" runat="server" Text='<%# Bind("ProductID") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="ProductName">
<EditItemTemplate>
<asp:TextBox ID="txtName" runat="server" Text='<%# Bind("ProductName") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Bind("ProductName") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="UnitPrice">
<ItemTemplate>
<asp:Label ID="Label3" runat="server" Text='<%# Bind("UnitPrice") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="操">
<ItemTemplate>
<asp:LinkButton ID="del" runat="server" OnClientClick="return confirm('您確定要刪除嗎？')" CommandName="dell" >刪除</asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
<asp:CommandField ShowEditButton="True" HeaderText="作">
<HeaderStyle HorizontalAlign="Center" />
<ItemStyle HorizontalAlign="Center" Width="85px" ForeColor="Blue" />
</asp:CommandField>
</Columns>
<FooterStyle BackColor="#1C5E55" Font-Bold="True" ForeColor="White"
HorizontalAlign="Right" />
<PagerStyle BackColor="#666666" ForeColor="White" HorizontalAlign="Center" />
<SelectedRowStyle BackColor="#C5BBAF" Font-Bold="True" ForeColor="#333333" />
<HeaderStyle BackColor="#1C5E55" Font-Bold="True" ForeColor="White" />
<EditRowStyle BackColor="#7C6F57" />
<AlternatingRowStyle BackColor="White" />
</asp:GridView>
2.前臺操控呼叫業務
DalBll db = new DalBll();
static List<Products> tmpList = new List<Products>();
protected void Page_Load(object sender, EventArgs e)
{
if(!IsPostBack)
{
InitGridView();
}
}
private void InitGridView()
{
tmpList = db.GetDataList();
this.GridView1.DataSource = tmpList;
this.GridView1.DataBind();
}
//繫結資料時觸發
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
Products tmp = e.Row.DataItem as Products;
LinkButton lbtn = e.Row.FindControl("del") as LinkButton;
if (lbtn != null && tmp != null)
lbtn.CommandArgument = tmp.ProductID.ToString();//繫結主鍵
}
}
//刪除資料
protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "dell")
{
int productID = Convert.ToInt32(e.CommandArgument);
db.Del(productID);
}
}
//分頁
protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
this.GridView1.PageIndex = e.NewPageIndex;
InitGridView();
}
//切換到編輯模式
protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
{
this.GridView1.EditIndex = e.NewEditIndex;
InitGridView();
}
//取消
protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
{
this.GridView1.EditIndex = -1;
InitGridView();
}
protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
//獲取當前頁索引
int i = this.GridView1.EditIndex;
//獲取文字框的值
string productsName = ((TextBox)(this.GridView1.Rows[i].FindControl("txtName"))).Text.ToString();
DataKey key = this.GridView1.DataKeys[e.RowIndex];
int id = Convert.ToInt32(key[0].ToString());
//首先找到該物件
Products tmp = tmpList.Where(c => c.ProductID == id).First();
tmp.ProductName = productsName;
db.Update(tmp);
InitGridView();
}
3.各操作資料的程式碼
public class DalBll
{
NorthwindEntities db = new NorthwindEntities();
public List<Products> GetDataList()
{
return db.Products.ToList();
}
public void Del(int productID)
{
Products tmp = db.Products.Where(c=>c.ProductID==productID).First();
db.DeleteObject(tmp);
db.SaveChanges();
}
public void Update(Products tmp)
{
//為引數物件建立實體鍵
EntityKey key;
object originalProductObj;
//因引數物件不屬於上下文，因此為該引數物件建立上下文實體鍵
key = db.CreateEntityKey("Products", tmp);
db.TryGetObjectByKey(key, out originalProductObj);
db.ApplyPropertyChanges(key.EntitySetName, tmp);
db.SaveChanges();
}