GridView编辑删除操作

 

  第一种：使用DataSource数据源中自带的编辑删除方法，这样的不经常使用，在这里就不加说明了。

  另外一种：使用GridView的三种事件：GridView1_RowEditing（编辑）、GridView1_RowUpdating（更新）、GridView1_RowCancelingEdit（取消编辑）。GridView1属性中将DataKeyNames的值设置为主键名，否则找不到索引，这个非常重要哦。

该方法有2种操作，一种是不正确绑定列转换为模板列，第二种是转换为模板列。

 

这里先说不转换为模板列的情况；

 

首先;先对GridView进行数据绑定，无论用代码绑定还是DataSource绑定都能够。绑定好后，对GridView加入绑定列 和编辑列 （注意这里，加入好后不做不论什么修改，千万不要将它们转换为模板列），加入好后，将所要绑定的数据库表字段填入 属性中。

protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)

{ //运行删除

string str = “delete from tb_hby where id='”+GridView1.DataKeys[e.RowIndex].Value.ToString()+”‘”;

    db.Delete(str); //db是操作类的实例，Delete是删除数据的方法

this.GridView1.DataBind();

protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)

{//运行更新

    string cell1 = ((TextBox)(GridView1.Rows[e.RowIndex].Cells[1].Controls[0])).Text.ToString().Trim();//第一列注意这样的写法非常重要

     string cell2 = ((TextBox)(GridView1.Rows[e.RowIndex].Cells[2].Controls[0])).Text.ToString().Trim();//第二列注意这样的写法非常重要

     string str = “update tb_hby set hby_title='” + cell1 + “‘,hby_Datetime='” + cell2 + “‘ where id='” + GridView1.DataKeys[e.RowIndex].Value.ToString() + “‘”;

        db.Update(str);//db是操作类的实例，Update是更新数据的方法

        GridView1.EditIndex = -1;

        GView();

protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)

 {//激活编辑button的事件

        this.GridView1.EditIndex = e.NewEditIndex;

        GView();

protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)

    {//取消编辑状态的事件

        GridView1.EditIndex = -1;

        GView();

}

说明：此方法中，如果要求某个绑定列不做编辑，则在它的前台代码中增加ReadOnly=”true”就可以。

此方法有一些缺点，比方对日期列进行格式化时，显示的时候是格式化后的日期，可是在编辑状态下仍然显示出日期的原貌，还有，某一列的字符太长时，不好对它进行字符截取。

在点击删除button的时候，假设须要一个弹出删除提示，则要将删除列转化为模板列，其代码例如以下：

<ItemTemplate>

  <asp:LinkButton ID=”LinkButton1″ runat=”server” CausesValidation=”False” CommandName=”Delete” OnClientClick=”return confirm(‘确定要删除吗？’)”                     Text=”删除”></asp:LinkButton>

</ItemTemplate>

也能够这样写：

在RowDataBind事件中：

if (e.Row.RowType == DataControlRowType.DataRow)

        {

            LinkButton lnkdelete = (LinkButton)e.Row.FindControl(“lnkdelete”);

            lnkdelete.Attributes.Add(“onclick”,”return confirm(‘您确定要删除吗？’)”);

        }

假设不转化为模板列，这这样写：

if (e.Row.RowType == DataControlRowType.DataRow)

        {

            if (e.Row.RowState == DataControlRowState.Normal || e.Row.RowState == DataControlRowState.Alternate)

            {

                //((LinkButton)e.Row.Cells[7].Controls[0]).Attributes.Add(“onclick”, “javascript:return confirm(‘你确认要删除：\”” + e.Row.Cells[0].Text + “\”吗?’)”);

                ((LinkButton)e.Row.Cells[7].Controls[0]).Attributes.Add(“onclick”, “javascript:return confirm(‘你确认要删除吗?’)”);

            }

        }

完整代码例如以下：

<asp:GridView ID=”GridView1″ runat=”server” AutoGenerateColumns=”False” DataKeyNames=”id” OnRowDeleting=”GridView1_RowDeleting” OnRowEditing=”GridView1_RowEditing” OnRowCancelingEdit=”GridView1_RowCancelingEdit” OnRowUpdating=”GridView1_RowUpdating”>

            <Columns>

                <asp:BoundField DataField=”id” HeaderText=”id” InsertVisible=”False” ReadOnly=”True”  SortExpression=”id” />

 

                <asp:BoundField DataField=”hby_Title” HeaderText=”hby_Title”  SortExpression=”hby_Title” AccessibleHeaderText=”fgfg” />

 

                <asp:BoundField DataField=”hby_Datetime” DataFormatString=”{0:HH:mm}”  />

                <asp:CommandField ShowEditButton=”True” />

                <asp:TemplateField ShowHeader=”False”>

                    <ItemTemplate>

                        <asp:LinkButton ID=”LinkButton1″ runat=”server” CausesValidation=”False” CommandName=”Delete” OnClientClick=”return confirm(‘确定要删除吗？’)”

                            Text=”删除”></asp:LinkButton>

                    </ItemTemplate>

                </asp:TemplateField>

            </Columns>

        </asp:GridView>

后台代码：

public partial class Default3 : System.Web.UI.Page

{

    DBconn db = new DBconn();

    protected void Page_Load(object sender, EventArgs e)

    {

        if (!Page.IsPostBack)

        {

            GView();

        }

    }

 

    private void GView()

    {

        string strbind = “select id,hby_title,hby_Datetime from tb_hby order by id desc”;

        this.GridView1.DataSource = db.getDataSet(strbind);

        this.GridView1.DataBind();

    }

    protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)

    {

        string str = “delete from tb_hby where id='”+GridView1.DataKeys[e.RowIndex].Value.ToString()+”‘”;

        db.Delete(str);

        this.GridView1.DataBind();

    }

    protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)

    {

        this.GridView1.EditIndex = e.NewEditIndex;

        GView();

    }

    protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)

    {

        string cell1 = ((TextBox)(GridView1.Rows[e.RowIndex].Cells[1].Controls[0])).Text.ToString().Trim();//第一列

        string cell2 = ((TextBox)(GridView1.Rows[e.RowIndex].Cells[2].Controls[0])).Text.ToString().Trim();//第二列

        string str = “update tb_hby set hby_title='” + cell1 + “‘,hby_Datetime='” + cell2 + “‘ where id='” + GridView1.DataKeys[e.RowIndex].Value.ToString() + “‘”;

        db.Update(str);//db是操作类的实例，Update是更新数据的方法

        GridView1.EditIndex = -1;

        GView();

    }

    protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)

    {

        GridView1.EditIndex = -1;

        GView();

    }

}

 

 

下面是对绑定列转换为模板列的操作（包含将编辑列和删除列都转化为模板列）：

private void GView()

{//绑定数据源

   string strbind = “select top 15 id,hby_title,hhhhh,hby_Datetime from tb_hby”;

   this.GridView1.DataSource = db.getDataSet(strbind);

   this.GridView1.DataBind();

}

protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)

{//运行删除

   string str = “delete from tb_hby where id='”+GridView1.DataKeys[e.RowIndex].Value.ToString()+”‘”;

   db.Delete(str);

    //GView();

    Response.Write(“<script language=’JavaScript’>”);

    Response.Write(“alert(‘删除成功!’);location.href=’default3.aspx’;”);

    Response.Write(“</script>”);

 }

 protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)

 {//激活编辑

        this.GridView1.EditIndex = e.NewEditIndex;

        GView();

 }

 protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)

 {//运行更新

string EditTitle = ((TextBox)(GridView1.Rows[e.RowIndex].FindControl(“TextBox1”))).Text.ToString().Trim();

   string DateTimestr = ((TextBox)(GridView1.Rows[e.RowIndex].FindControl(“TextBox2”))).Text;//注意：日期字段不要加ToString()，否则会报错，而nvarchar和int的字段能够加

    string hhh = ((TextBox)(GridView1.Rows[e.RowIndex].FindControl(“TextBox3”))).Text.ToString();

   string str = “update tb_hby set hby_title='” +EditTitle + “‘,hby_Datetime='” + DateTimestr + “‘,hhhhh='”+hhh+”‘ where id='” + GridView1.DataKeys[e.RowIndex].Value.ToString() + “‘”;

   db.Update(str);

   GridView1.EditIndex = -1;

   GView();

 }

 

这里千万要注意：

当对绑定列转换为模板列了之后，编辑列这样写：

string EditTitle = ((TextBox)(GridView1.Rows[e.RowIndex].FindControl(“TextBox1”))).Text.ToString().Trim();

不转化为模板列的时候，编辑列这样写：

string EditTitle = ((TextBox)(GridView1.Rows[e.RowIndex].Cells[1].Controls[0])).Text.ToString().Trim();

 

这里easy搞错，以致常常发生疑惑。

protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)

 {//取消编辑状态

        GridView1.EditIndex = -1;

        GView();

 }

 

下面是前台代码：

<asp:GridView ID=”GridView1″ runat=”server” AutoGenerateColumns=”False” DataKeyNames=”id” OnRowDeleting=”GridView1_RowDeleting” OnRowEditing=”GridView1_RowEditing” OnRowCancelingEdit=”GridView1_RowCancelingEdit” OnRowUpdating=”GridView1_RowUpdating”>

            <Columns>

                <asp:BoundField DataField=”id” HeaderText=”id” InsertVisible=”False” ReadOnly=”True”

                    SortExpression=”id” />

                <asp:TemplateField AccessibleHeaderText=”fgfg” HeaderText=”hby_Title” SortExpression=”hby_Title”>

                    <EditItemTemplate>

                        <asp:TextBox ID=”TextBox1″ runat=”server” Text='<%# Eval(“hby_Title”) %>’></asp:TextBox>

                    </EditItemTemplate>

                    <ItemTemplate>

                        <asp:Label ID=”Label1″ runat=”server” Text='<%# Eval(“hby_Title”) %>’></asp:Label>

                    </ItemTemplate>

                </asp:TemplateField>

                <asp:TemplateField>

                    <EditItemTemplate>

                        <asp:TextBox ID=”TextBox2″ runat=”server” Text='<%#  Eval(“hby_Datetime”, “{0:HH:mm}”) %>’></asp:TextBox>

                    </EditItemTemplate>

                    <ItemTemplate>

                        <asp:Label ID=”Label2″ runat=”server” Text='<%# Eval(“hby_Datetime”, “{0:HH:mm}”) %>’></asp:Label>

                    </ItemTemplate>

                </asp:TemplateField>

                <asp:TemplateField HeaderText=”好”>

                    <EditItemTemplate>

                        <asp:TextBox ID=”TextBox3″ runat=”server” Text='<%# Bind(“hhhhh”) %>’></asp:TextBox>

                    </EditItemTemplate>

                    <ItemTemplate>

                        <asp:Label ID=”Label3″ runat=”server” Text='<%# Bind(“hhhhh”) %>’></asp:Label>

                    </ItemTemplate>

                </asp:TemplateField>

                <asp:TemplateField ShowHeader=”False”>

                    <EditItemTemplate>

                        <asp:LinkButton ID=”LkBtnUpdate” runat=”server” CausesValidation=”True” CommandName=”Update”

                            Text=”更新”></asp:LinkButton>

                        <asp:LinkButton ID=”LkBtnCtrl” runat=”server” CausesValidation=”False” CommandName=”Cancel”

                            Text=”取消”></asp:LinkButton>

                    </EditItemTemplate>

                    <ItemTemplate>

                         <img src=”img/edt.gif” /><asp:LinkButton ID=”LinkButton2″ runat=”server” CausesValidation=”False” CommandName=”Edit”

                            Text=”编辑”></asp:LinkButton>

                    </ItemTemplate>

                </asp:TemplateField>

                <asp:TemplateField ShowHeader=”False” HeaderText=”删除”>

                    <ItemTemplate>

                       <asp:LinkButton ID=”LinkButton1″ runat=”server” CausesValidation=”False” CommandName=”Delete” OnClientClick=”return confirm(‘确定要删除吗？’)”

                            Text=”删除”></asp:LinkButton>

                    </ItemTemplate>

                </asp:TemplateField>

            </Columns>

        </asp:GridView>

 

以上绑定中，不管是Eval或者Bind都能够。

 

 

  第三种方法：将编辑和显示都放在模板列中，代码例如以下：

前台绑定：

<asp:TemplateField HeaderText=”出团日期”>

    <ItemTemplate>

      <asp:TextBox ID=”tbx_ctrq” runat=”server” Text='<%# Eval(“cspd_ctrq”) %>’ Visible=”false”></asp:TextBox>

      <asp:Label ID=”lbl_ctrq” runat=”server” Text='<%# Eval(“cspd_ctrq”) %>’></asp:Label>

   </ItemTemplate>

  <ControlStyle Width=”84px” />

</asp:TemplateField>

<asp:TemplateField HeaderText=”价格”>

   <ItemTemplate>

   <asp:TextBox ID=”tbx_price” runat=”server” Text='<%# Eval(“cspd_price”) %>’ Visible=”false”></asp:TextBox>

   <asp:Label ID=”lbl_price” runat=”server” Text='<%# Eval(“cspd_price”) %>’></asp:Label>

 </ItemTemplate>

  <ControlStyle Width=”60px” />

</asp:TemplateField>

 

<asp:TemplateField HeaderText=”编辑” ShowHeader=”False”>

  <ItemTemplate>

    <asp:LinkButton ID=”LB_edit” runat=”server” CausesValidation=”False” CommandArgument='<%# ((GridViewRow) Container).RowIndex %>’ CommandName=”iEdit” Text=”编辑”></asp:LinkButton>

   <asp:LinkButton ID=”LB_upd” runat=”server” CausesValidation=”True” CommandName=”iUpdate”

       Visible=”false” CommandArgument='<%# ((GridViewRow) Container).RowIndex %>’ Text=”更新”></asp:LinkButton>

   <asp:LinkButton ID=”LB_cancel” runat=”server” CausesValidation=”False” CommandName=”iCancel” Visible=”false” CommandArgument='<%# ((GridViewRow) Container).RowIndex %>’ Text=”取消”></asp:LinkButton>

  </ItemTemplate>

</asp:TemplateField>

<asp:TemplateField HeaderText=”删除”>

  <ItemTemplate>

   <asp:LinkButton ID=”LB_Del” runat=”server” OnClientClick=”return confirm(‘确定要删除吗？’)”

       CommandName=”Delete” Text=”删除”></asp:LinkButton>

  </ItemTemplate>

</asp:TemplateField>

 

 

后台代码例如以下：

protected void GV_Main_RowCommand(object sender, GridViewCommandEventArgs e)

    {

        if (e.CommandName == “iEdit”)

        {

            int rowIndex = Convert.ToInt32(e.CommandArgument);

            ((LinkButton)GV_Main.Rows[rowIndex].FindControl(“LB_edit”)).Visible = false;

            ((LinkButton)GV_Main.Rows[rowIndex].FindControl(“LB_upd”)).Visible = true;

            ((LinkButton)GV_Main.Rows[rowIndex].FindControl(“LB_cancel”)).Visible = true;

 

            ((Label)GV_Main.Rows[rowIndex].FindControl(“lbl_chanpin”)).Visible = false;

            ((TextBox)GV_Main.Rows[rowIndex].FindControl(“tbx_chanpin”)).Visible = true;

 

            ((Label)GV_Main.Rows[rowIndex].FindControl(“lbl_ctrq”)).Visible = false;

            ((TextBox)GV_Main.Rows[rowIndex].FindControl(“tbx_ctrq”)).Visible = true;

        }

        if (e.CommandName == “iCancel”)

        {

            int rowIndex = Convert.ToInt32(e.CommandArgument);

            ((LinkButton)GV_Main.Rows[rowIndex].FindControl(“LB_edit”)).Visible = true;

            ((LinkButton)GV_Main.Rows[rowIndex].FindControl(“LB_upd”)).Visible = false;

            ((LinkButton)GV_Main.Rows[rowIndex].FindControl(“LB_cancel”)).Visible = false;

 

            ((Label)GV_Main.Rows[rowIndex].FindControl(“lbl_chanpin”)).Visible = true;

            ((TextBox)GV_Main.Rows[rowIndex].FindControl(“tbx_chanpin”)).Visible = false;

 

            ((Label)GV_Main.Rows[rowIndex].FindControl(“lbl_ctrq”)).Visible = true;

            ((TextBox)GV_Main.Rows[rowIndex].FindControl(“tbx_ctrq”)).Visible = false;

        }

        if (e.CommandName == “iUpdate”)

        {

            int rowIndex = Convert.ToInt32(e.CommandArgument);

            if (!wpf.IsNum(((TextBox)GV_Main.Rows[rowIndex].FindControl(“tbx_price”)).Text.Trim()))

            {

                Page.ClientScript.RegisterStartupScript(this.GetType(), “Startup”, “<script>alert(‘价格必须是数字！’);</script>”);

            }

             string strupd = “UPDATE [tb_cspd] SET [cspd_chanpin] = ‘” + wpf.checkStr(((TextBox)GV_Main.Rows[rowIndex].FindControl(“tbx_chanpin”)).Text.Trim()) + “‘, [cspd_ctrq] = ‘” + wpf.checkStr(((TextBox)GV_Main.Rows[rowIndex].FindControl(“tbx_ctrq”)).Text.Trim()) + “‘, WHERE [id] = ” + GV_Main.DataKeys[rowIndex][0].ToString();

 

                //Response.Write(strupd);

                wpf.SqlQuery(strupd);

                GV_Main.DataBind();

            }

        }

}

 

 

 

点击编辑button后统一列在文本框中进行编辑：

效果：

首先还是在GridView1属性中将DataKeyNames的值设置为主键名

前台代码：

<asp:GridView ID=”GridView3″ runat=”server” AutoGenerateColumns=”False” OnRowCommand=”GridView3_RowCommand” DataKeyNames=”News_Id”>

                        <Columns>

                            <asp:BoundField DataField=”News_Title” HeaderText=”标题” />

                            <asp:BoundField DataField=”News_Source” HeaderText=”来源” />

                            <asp:BoundField DataField=”News_Date” HeaderText=”日期” />

                            <asp:TemplateField HeaderText=”编辑”>

                                <ItemTemplate>

                                    <asp:LinkButton ID=”LkBtnbianji” runat=”server” CommandName=”edit_ok” CommandArgument='<%# ((GridViewRow) Container).RowIndex  %>’>编辑</asp:LinkButton>

                                </ItemTemplate>

                            </asp:TemplateField>

                        </Columns>

                    </asp:GridView>

 

后台代码：

private void GView3()

    {

        string strbind = “select News_Id,News_Title,News_Source,News_Date from tb_News”;

        this.GridView3.DataSource = db.getDataSet(strbind);

        this.GridView3.DataBind();

    }

    protected void GridView3_RowCommand(object sender, GridViewCommandEventArgs e)

    {

        if (e.CommandName == “edit_ok”)

        {

            int rowIndex = Convert.ToInt32(e.CommandArgument);

            string strbind = “select News_Id,News_Title,News_Source,News_Date from tb_News where News_Id=” + GridView3.DataKeys[rowIndex][0].ToString();

            DataRow dr = db.getDataSet(strbind).Tables[0].Rows[0];

            this.BunAdd.CommandArgument = GridView3.DataKeys[rowIndex][0].ToString();

            this.TextTitle.Text = dr[“News_Title”].ToString();

            this.TextType.Text=dr[“News_Source”].ToString();

            this.TextDatetime.Text = dr[“News_Date”].ToString();

        }

    }

    protected void BunAdd_Click(object sender, EventArgs e)

    {

        string up = “update tb_News set News_Title='” + this.TextTitle.Text.Trim() + “‘,News_Source='” + this.TextType.Text.Trim() + “‘,News_Date='” + this.TextDatetime.Text.Trim() + “‘ where News_Id=”+BunAdd.CommandArgument;

        db.Update(up);

        GView3();

    }