最近研究了在 GridView 中也能新增、刪除、修改以及排序，參考了兩篇文章
GridView 排序
GridView 新刪修
經過稍加修改後，使用微軟範例資料庫 NorthWind ( 北風 ) 做測試，終於完成，以下為 *.aspx 程式碼：
<asp:GridView ID="gv" runat="server" AutoGenerateColumns="false" OnRowEditing="gv_RowEditing" OnRowCancelingEdit="gv_RowCancelingEdit" OnRowUpdating="gv_RowUpdating" BackColor="#DDDDDD" BorderStyle="None" BorderWidth="1px" CellPadding="5" CellSpacing="1" GridLines="None" Style="line-height: 22px; width: 100%;" onrowdeleting="gv_RowDeleting" AllowPaging="True" onpageindexchanging="gv_PageIndexChanging" PageSize="10" AllowSorting="True" onsorting="gv_Sorting"> <RowStyle BackColor="#ffffff" ForeColor="Black" /> <FooterStyle BackColor="#CCCCCC" ForeColor="Black" /> <PagerStyle BackColor="#ffffff" HorizontalAlign="left" /> <HeaderStyle BackColor="#efefef" Font-Bold="True" /> <AlternatingRowStyle BackColor="#f7fafe" /> <EmptyDataTemplate> Sorry, No any data. </EmptyDataTemplate> <Columns> <asp:TemplateField> <HeaderTemplate> <asp:LinkButton ID="lbInsert" runat="server" Width="70px" onclick="lbInsert_Click">新增</asp:LinkButton> </HeaderTemplate> <ItemTemplate> <asp:LinkButton ID="lbEdit" runat="server" CommandName="Edit">編輯</asp:LinkButton> | <asp:LinkButton ID="lbDelete" runat="server" OnClientClick="javascript:return confirm('確定刪除?')" CommandName="Delete">刪除</asp:LinkButton> </ItemTemplate> <EditItemTemplate> <asp:LinkButton ID="lbUpdate" runat="server" CommandName="Update">更新</asp:LinkButton> | <asp:LinkButton ID="lbCancelUpdate" runat="server" CommandName="Cancel">取消</asp:LinkButton> </EditItemTemplate> <FooterTemplate> <asp:LinkButton ID="lbSave" runat="server" onclick="lbSave_Click">儲存</asp:LinkButton> | <asp:LinkButton ID="lbCancelSave" runat="server" onclick="lbCancelSave_Click">取消</asp:LinkButton> </FooterTemplate> </asp:TemplateField> <asp:TemplateField HeaderText="客戶編號" SortExpression="CustomerID"> <ItemTemplate> <asp:Label ID="lblCustomerID" runat="server" Text='<%# Eval("CustomerID") %>'></asp:Label> </ItemTemplate> <EditItemTemplate> <asp:Label ID="lblCustomerIDEdit" runat="server" Text='<%# Eval("CustomerID") %>'></asp:Label> </EditItemTemplate> <FooterTemplate> <asp:TextBox ID="tbCustomerIDFooter" runat="server" Text=""></asp:TextBox> </FooterTemplate> </asp:TemplateField> <asp:TemplateField HeaderText="公司名稱" SortExpression="CompanyName"> <ItemTemplate> <asp:Label ID="lblCompanyName" runat="server" Text='<%# Eval("CompanyName") %>'></asp:Label> </ItemTemplate> <EditItemTemplate> <asp:TextBox ID="tbCompanyNameEdit" runat="server" Text='<%# Eval("CompanyName") %>' ></asp:TextBox> </EditItemTemplate> <FooterTemplate> <asp:TextBox ID="tbCompanyNameFooter" runat="server" Text=""></asp:TextBox> </FooterTemplate> </asp:TemplateField> <asp:TemplateField HeaderText="聯絡人姓名" SortExpression="ContactName"> <ItemTemplate> <asp:Label ID="lblContactName" runat="server" Text='<%# Eval("ContactName") %>'></asp:Label> </ItemTemplate> <EditItemTemplate> <asp:TextBox ID="tbContactNameEdit" runat="server" Text='<%# Eval("ContactName") %>'></asp:TextBox> </EditItemTemplate> <FooterTemplate> <asp:TextBox ID="tbContactNameFooter" runat="server" Text=""></asp:TextBox> </FooterTemplate> </asp:TemplateField> <asp:TemplateField HeaderText="聯絡人職稱" SortExpression="ContactTitle"> <ItemTemplate> <asp:Label ID="lblContactTitle" runat="server" Text='<%# Eval("ContactTitle") %>'></asp:Label> </ItemTemplate> <EditItemTemplate> <asp:TextBox ID="tbContactTitleEdit" runat="server" Text='<%# Eval("ContactTitle") %>'></asp:TextBox> </EditItemTemplate> <FooterTemplate> <asp:TextBox ID="tbContactTitleFooter" runat="server" Text=""></asp:TextBox> </FooterTemplate> </asp:TemplateField> <asp:TemplateField HeaderText="地址" SortExpression="Address"> <ItemTemplate> <asp:Label ID="lblAddress" runat="server" Text='<%# Eval("Address") %>'></asp:Label> </ItemTemplate> <EditItemTemplate> <asp:TextBox ID="tbAddressEdit" runat="server" Text='<%# Eval("Address") %>'></asp:TextBox> </EditItemTemplate> <FooterTemplate> <asp:TextBox ID="tbAddressFooter" runat="server" Text=""></asp:TextBox> </FooterTemplate> </asp:TemplateField> <asp:TemplateField HeaderText="城市" SortExpression="City"> <ItemTemplate> <asp:Label ID="lblCity" runat="server" Text='<%# Eval("City") %>'></asp:Label> </ItemTemplate> <EditItemTemplate> <asp:TextBox ID="tbCityEdit" runat="server" Text='<%# Eval("City") %>'></asp:TextBox> </EditItemTemplate> <FooterTemplate> <asp:TextBox ID="tbCityFooter" runat="server" Text=""></asp:TextBox> </FooterTemplate> </asp:TemplateField> <asp:TemplateField HeaderText="地區" SortExpression="Region"> <ItemTemplate> <asp:Label ID="lblRegion" runat="server" Text='<%# Eval("Region") %>'></asp:Label> </ItemTemplate> <EditItemTemplate> <asp:TextBox ID="tbRegionEdit" runat="server" Text='<%# Eval("Region") %>'></asp:TextBox> </EditItemTemplate> <FooterTemplate> <asp:TextBox ID="tbRegionFooter" runat="server" Text=""></asp:TextBox> </FooterTemplate> </asp:TemplateField> <asp:TemplateField HeaderText="郵遞區號" SortExpression="PostalCode"> <ItemTemplate> <asp:Label ID="lblPostalCode" runat="server" Text='<%# Eval("PostalCode") %>'></asp:Label> </ItemTemplate> <EditItemTemplate> <asp:TextBox ID="tbPostalCodeEdit" runat="server" Text='<%# Eval("PostalCode") %>'></asp:TextBox> </EditItemTemplate> <FooterTemplate> <asp:TextBox ID="tbPostalCodeFooter" runat="server" Text=""></asp:TextBox> </FooterTemplate> </asp:TemplateField> <asp:TemplateField HeaderText="國家" SortExpression="Country"> <ItemTemplate> <asp:Label ID="lblCountry" runat="server" Text='<%# Eval("Country") %>'></asp:Label> </ItemTemplate> <EditItemTemplate> <asp:TextBox ID="tbCountryEdit" runat="server" Text='<%# Eval("Country") %>'></asp:TextBox> </EditItemTemplate> <FooterTemplate> <asp:TextBox ID="tbCountryFooter" runat="server" Text=""></asp:TextBox> </FooterTemplate> </asp:TemplateField> <asp:TemplateField HeaderText="電話" SortExpression="Phone"> <ItemTemplate> <asp:Label ID="lblPhone" runat="server" Text='<%# Eval("Phone") %>'></asp:Label> </ItemTemplate> <EditItemTemplate> <asp:TextBox ID="tbPhoneEdit" runat="server" Text='<%# Eval("Phone") %>'></asp:TextBox> </EditItemTemplate> <FooterTemplate> <asp:TextBox ID="tbPhoneFooter" runat="server" Text=""></asp:TextBox> </FooterTemplate> </asp:TemplateField> <asp:TemplateField HeaderText="傳真" SortExpression="Fax"> <ItemTemplate> <asp:Label ID="lblFax" runat="server" Text='<%# Eval("Fax") %>'></asp:Label> </ItemTemplate> <EditItemTemplate> <asp:TextBox ID="tbFaxEdit" runat="server" Text='<%# Eval("Fax") %>'></asp:TextBox> </EditItemTemplate> <FooterTemplate> <asp:TextBox ID="tbFaxFooter" runat="server" Text=""></asp:TextBox> </FooterTemplate> </asp:TemplateField> </Columns> </asp:GridView>
而 *.cs 檔要引用三個參考，
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
程式碼：
private SqlConnection connection; private SqlCommand command; private SqlDataAdapter adapter; private DataTable dt; private string strConnection; private string strConnectionName = "NorthwindConnectionString"; protected void Page_Load(object sender, EventArgs e) { /* 建立資料庫連線 */ strConnection = ConfigurationManager. ConnectionStrings[strConnectionName].ConnectionString; connection = new SqlConnection(strConnection); command = new SqlCommand(); command.Connection = connection; if (!IsPostBack) GVGetData(); } /// <summary> /// 取得資料 /// </summary> private DataTable GetData() { dt = new DataTable(); command.CommandText = "SELECT * FROM Customers "; adapter = new SqlDataAdapter(command); adapter.Fill(dt); return dt; } /// <summary> /// 取得資料 /// </summary> private void GVGetData() { DataTable _dt; if (ViewState["se"] == null) { _dt = GetData(); gv.DataSource = _dt; gv.DataBind(); } else { string se = Convert.ToString(ViewState["se"]); SortDirection sd = (SortDirection)ViewState["sd"]; this.GVGetData(sd, se); } } /// <summary> /// 取得排序資料 /// </summary> private void GVGetData(SortDirection pSortDirection, string pSortExpression) { DataTable _dt = GetData(); string sSort = string.Empty; if (pSortDirection == SortDirection.Ascending) { sSort = pSortExpression; } else { sSort = string.Format("{0} {1}", pSortExpression, "DESC"); } DataView dv = _dt.DefaultView; dv.Sort = sSort; gv.DataSource = dv; gv.DataBind(); } /// <summary> /// 編輯資料 /// </summary> protected void gv_RowEditing(object sender, GridViewEditEventArgs e) { gv.EditIndex = e.NewEditIndex; GVGetData(); } /// <summary> /// 取消編輯 /// </summary> protected void gv_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e) { gv.EditIndex = -1; GVGetData(); } /// <summary> /// 更新資料 /// </summary> protected void gv_RowUpdating(object sender, GridViewUpdateEventArgs e) { string strCustomerID, strCompanyName, strContactName, strContactTitle, strAddress, strCity, strRegion, strPostalCode, strCountry, strPhone, strFax; strCustomerID = ((Label)gv.Rows[e.RowIndex].Cells[0]. FindControl("lblCustomerIDEdit")).Text; strCompanyName = ((TextBox)gv.Rows[e.RowIndex].Cells[0]. FindControl("tbCompanyNameEdit")).Text; strContactName = ((TextBox)gv.Rows[e.RowIndex].Cells[0]. FindControl("tbContactNameEdit")).Text; strContactTitle = ((TextBox)gv.Rows[e.RowIndex].Cells[0]. FindControl("tbContactTitleEdit")).Text; strAddress = ((TextBox)gv.Rows[e.RowIndex].Cells[0]. FindControl("tbAddressEdit")).Text; strCity = ((TextBox)gv.Rows[e.RowIndex].Cells[0]. FindControl("tbCityEdit")).Text; strRegion = ((TextBox)gv.Rows[e.RowIndex].Cells[0]. FindControl("tbRegionEdit")).Text; strPostalCode = ((TextBox)gv.Rows[e.RowIndex].Cells[0]. FindControl("tbPostalCodeEdit")).Text; ; strCountry = ((TextBox)gv.Rows[e.RowIndex].Cells[0]. FindControl("tbCountryEdit")).Text; strPhone = ((TextBox)gv.Rows[e.RowIndex].Cells[0]. FindControl("tbPhoneEdit")).Text; strFax = ((TextBox)gv.Rows[e.RowIndex].Cells[0]. FindControl("tbFaxEdit")).Text; /* 更新資料驗證作業 ... ... ... */ /* 更新資料 */ command.Parameters.Clear(); command.Parameters.AddWithValue("customerID", strCustomerID); command.Parameters.AddWithValue("companyName", strCompanyName); command.Parameters.AddWithValue("contactName", strContactName); command.Parameters.AddWithValue("contactTitle", strContactTitle); command.Parameters.AddWithValue("address", strAddress); command.Parameters.AddWithValue("city", strCity); command.Parameters.AddWithValue("region", strRegion); command.Parameters.AddWithValue("postalCode", strPostalCode); command.Parameters.AddWithValue("country", strCountry); command.Parameters.AddWithValue("phone", strPhone); command.Parameters.AddWithValue("fax", strFax); command.CommandText = @"UPDATE Customers SET CompanyName=@companyName, " + @"ContactName=@contactName, ContactTitle=@contactTitle, " + @"Address=@address, City=@city, Region=@region, " + @"PostalCode=@postalCode, Country=@country, " + @"Phone=@phone, Fax=@fax " + @"WHERE CustomerID=@customerID "; connection.Open(); command.ExecuteNonQuery(); connection.Close(); gv.EditIndex = -1; GVGetData(); } /// <summary> /// 刪除資料 /// </summary> protected void gv_RowDeleting(object sender, GridViewDeleteEventArgs e) { string strCustomerID; strCustomerID = ((Label)gv.Rows[e.RowIndex].Cells[0]. FindControl("lblCustomerID")).Text; /* 刪除資料 */ command.Parameters.Clear(); command.Parameters.AddWithValue("customerID", strCustomerID); command.CommandText = "DELETE FROM Customers WHERE CustomerID=@customerID "; connection.Open(); command.ExecuteNonQuery(); connection.Close(); GVGetData(); } protected void lbInsert_Click(object sender, EventArgs e) { gv.FooterRow.Visible = true; } protected void lbCancelSave_Click(object sender, EventArgs e) { gv.FooterRow.Visible = false; } /// <summary> /// 儲存資料 /// </summary> protected void lbSave_Click(object sender, EventArgs e) { string strCustomerID, strCompanyName, strContactName, strContactTitle, strAddress, strCity, strRegion, strPostalCode, strCountry, strPhone, strFax; strCustomerID = ((TextBox)gv.FooterRow.Cells[0]. FindControl("tbCustomerIDFooter")).Text; strCompanyName = ((TextBox)gv.FooterRow.Cells[0]. FindControl("tbCompanyNameFooter")).Text; strContactName = ((TextBox)gv.FooterRow.Cells[0]. FindControl("tbContactNameFooter")).Text; strContactTitle = ((TextBox)gv.FooterRow.Cells[0]. FindControl("tbContactTitleFooter")).Text; strAddress = ((TextBox)gv.FooterRow.Cells[0]. FindControl("tbAddressFooter")).Text; strCity = ((TextBox)gv.FooterRow.Cells[0]. FindControl("tbCityFooter")).Text; strRegion = ((TextBox)gv.FooterRow.Cells[0]. FindControl("tbRegionFooter")).Text; strPostalCode = ((TextBox)gv.FooterRow.Cells[0]. FindControl("tbPostalCodeFooter")).Text; ; strCountry = ((TextBox)gv.FooterRow.Cells[0]. FindControl("tbCountryFooter")).Text; strPhone = ((TextBox)gv.FooterRow.Cells[0]. FindControl("tbPhoneFooter")).Text; strFax = ((TextBox)gv.FooterRow.Cells[0]. FindControl("tbFaxFooter")).Text; /* 新增資料驗證作業 ... ... ... */ /* 更新資料 */ command.Parameters.Clear(); command.Parameters.AddWithValue("customerID", strCustomerID); command.Parameters.AddWithValue("companyName", strCompanyName); command.Parameters.AddWithValue("contactName", strContactName); command.Parameters.AddWithValue("contactTitle", strContactTitle); command.Parameters.AddWithValue("address", strAddress); command.Parameters.AddWithValue("city", strCity); command.Parameters.AddWithValue("region", strRegion); command.Parameters.AddWithValue("postalCode", strPostalCode); command.Parameters.AddWithValue("country", strCountry); command.Parameters.AddWithValue("phone", strPhone); command.Parameters.AddWithValue("fax", strFax); command.CommandText = @"INSERT INTO Customers (CustomerID, CompanyName, " + @"ContactName, ContactTitle, Address, City, Region, " + @"PostalCode, Country, Phone, Fax) VALUES (@customerID, " + @"@companyName, @contactName, @contactTitle, @address, " + @"@city, @region, @postalCode, @country, @phone, @fax )"; connection.Open(); command.ExecuteNonQuery(); connection.Close(); GVGetData(); } /// <summary> /// 換頁 /// </summary> protected void gv_PageIndexChanging(object sender, GridViewPageEventArgs e) { gv.PageIndex = e.NewPageIndex; GVGetData(); } /// <summary> /// 排序 /// </summary> protected void gv_Sorting(object sender, GridViewSortEventArgs e) { string se = ViewState["se"] != null ? Convert.ToString(ViewState["se"]) : string.Empty; SortDirection sd = ViewState["sd"] != null ? (SortDirection)ViewState["sd"] : SortDirection.Ascending; if (string.IsNullOrEmpty(se)) { se = e.SortExpression; sd = SortDirection.Ascending; } // 如果欄位與本來不同 if (se != e.SortExpression) { // 切換為目前所指定欄位 se = e.SortExpression; // 指定排列方式為升冪 sd = SortDirection.Ascending; } // 如果欄位與本來相同 else { // 切換升冪為降冪，降冪為升冪 if (sd == SortDirection.Ascending) sd = SortDirection.Descending; else sd = SortDirection.Ascending; } // 紀錄欄位與排列方式 ( 升冪或降冪 ) ViewState["se"] = se; ViewState["sd"] = sd; GVGetData(sd, se); }
顯示：
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protected void lbSave_Click(object sender, EventArgs e)
回覆刪除{
string strTxt_TeacherName, strTxt_NewTeacher, strTxt_School, strTxt_Field, strTxt_Office, strTxt_Phone, strTxt_Mail;
strTxt_TeacherName = ((TextBox)GridView1.FooterRow.Cells[0].FindControl("老師姓名")).Text;
strTxt_NewTeacher = ((TextBox)GridView1.FooterRow.Cells[0].FindControl("老師職位")).Text;
strTxt_School = ((TextBox)GridView1.FooterRow.Cells[0].FindControl("學歷")).Text;
strTxt_Field = ((TextBox)GridView1.FooterRow.Cells[0].FindControl("研究領域")).Text;
strTxt_Office = ((TextBox)GridView1.FooterRow.Cells[0].FindControl("辦公室")).Text;
strTxt_Phone = ((TextBox)GridView1.FooterRow.Cells[0].FindControl("連絡電話")).Text;
strTxt_Mail = ((TextBox)GridView1.FooterRow.Cells[0].FindControl("信箱")).Text;
command.Parameters.Clear();
command.Parameters.AddWithValue("老師姓名", strTxt_TeacherName);
command.Parameters.AddWithValue("老師職位", strTxt_NewTeacher);
command.Parameters.AddWithValue("學歷", strTxt_School);
command.Parameters.AddWithValue("研究領域", strTxt_Field);
command.Parameters.AddWithValue("辦公室", strTxt_Office);
command.Parameters.AddWithValue("連絡電話", strTxt_Phone);
command.Parameters.AddWithValue("信箱", strTxt_Mail);
command.CommandText =
@"INSERT INTO 師資介紹 (老師姓名, 老師職位, 學歷, 研究領域, 辦公室, 連絡電話, 信箱)
VALUES (@老師姓名, @老師職位, @學歷, @研究領域, @辦公室, @連絡電話, @信箱)";
connection.Open();
command.ExecuteNonQuery();
connection.Close();
GridView1.DataBind();
}
我參考你的程式碼修改了 可是新增一筆資料無法儲存 他上面顯示說NullReferenException
我想了解一下狀況，我的 SKYPE：david06172002
刪除這個範例很棒, 但有個問題, 如果一開始沒有資料的話, "新增"這個按鈕就不會出現了, 也就無法新增資料了
回覆刪除謝謝你的建議，當初沒有考慮到。或許可以把新增按鈕獨立出來，不過我想應該不難解決，就有勞各位讀者做延伸了。
刪除似乎排版會有問題...這是前端
回覆刪除//
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你好我使用您範例的程式碼~新增與更新功能沒有問題，但是刪除就會有問題，感覺按下刪除按鈕卻沒有進入
刪除protected void GridView1_RowDeleting
(object sender, GridViewDeleteEventArgs e){
//code
}
的方法內，code在這邊上傳會很亂如果不介意可以寄信給您，幫助我解決問題嗎~謝謝!!
無法輸入程式碼，所以在下面重新發問了~謝謝!!
刪除想請問一下 如果套進去Calendar_SelectionChanged事件裡 我要如何取出當天日期的資料!
回覆刪除請問，如果刪除時，JS跳出CONFIRM的詢問畫面，若點選NO拒絕的話，在程式哪段有做判斷呢？？~~~!!!
回覆刪除您可以單獨拉出一個 javascript function 出來做判斷，我認為，當按下取消時，其實不需要做任何動作
刪除