GridView行编辑、更新、取消、删除事件使用方法

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注意：当启用编辑button时，点击编辑button后会使一整行都切换成文本框。为了是一行中的一部分是文本框，须要把以整行的全部列都转换成模板，然后删掉编辑模板中的代码。这样就能使你想编辑的列转换成文本框。

1.界面

<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=”首页” LastPageText=”尾页” Mode=”NextPreviousFirstLast” NextPageText=”下一页” PreviousPageText=”上一页” /> <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”>

2.前台操控调用业务

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(); }

//绑定数据时触发 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();//绑定主键 } }

//删除数据 protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e) { if (e.CommandName == “dell”) { int productID = Convert.ToInt32(e.CommandArgument); db.Del(productID); }

}

//分页 protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e) { this.GridView1.PageIndex = e.NewPageIndex; InitGridView(); }

//切换到编辑模式 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) { //获取当前页索引 int i = this.GridView1.EditIndex; //获取文本框的值 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()); //首先找到该对象 Products tmp = tmpList.Where(c => c.ProductID == id).First(); tmp.ProductName = productsName; db.Update(tmp); InitGridView(); }

3.各操作数据的代码

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) { //为參数对象创建实体键 EntityKey key; object originalProductObj; //因參数对象不属于上下文，因此为该參数对象创建上下文实体键 key = db.CreateEntityKey(“Products”, tmp); db.TryGetObjectByKey(key, out originalProductObj); db.ApplyPropertyChanges(key.EntitySetName, tmp); db.SaveChanges(); }

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