ASPNET服务端控件练习(一个机试题)
时间：2014-04-29 17:17:34
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简单记录：
模糊查询的select语句的拼写
public List<Model.Student> GetWhereStudent(string name, string sub, string isG) { List<Web.Model.Student> lt = new List<Model.Student>(); string sql = "select * from SC_Student where studentName like @n and Subjects=@sub and IsGoodStudent=@is"; SqlParameter[] param = { new SqlParameter("@n","%"+name+"%"), new SqlParameter("@sub",sub), new SqlParameter("@is",isG)}; using (SqlDataReader reader = SqlHelper.ExecuteDataReader(sql, param)) { if (reader.HasRows) { while (reader.Read()) { Web.Model.Student stu = new Model.Student(); stu.ID = reader.GetInt32(0); stu.Name = reader.GetString(1); stu.SubId = this.GetSubName(reader.GetInt32(2)); stu.Score = reader.GetInt32(3); stu.IsGoodStudent = reader.GetBoolean(4); lt.Add(stu); } } } return lt; }
reader拿取 ROW_NUMBER() over(order by studentName)产生的值
public List<Model.StudentAvg> EditStudent(string name, string sco) { List<Web.Model.StudentAvg> lst = new List<Model.StudentAvg>(); int s = 0; SqlParameter[] param = { new SqlParameter("@likes","%"+name+"%"), new SqlParameter("@sco",int.TryParse(sco,out s)==true?s:0) }; using (SqlDataReader reader = SqlHelper.ExecuteProcedure("pro_Student_Avg", param)) { if (reader.HasRows) { while (reader.Read()) { Web.Model.StudentAvg stuavg = new Model.StudentAvg(); //拿取 ROW_NUMBER() over(order by studentName)产生的值 stuavg.ID = int.Parse(reader.GetSqlValue(0).ToString()); stuavg.Name = reader.GetString(1); stuavg.SSum = reader.GetInt32(2); stuavg.SAvg = reader.GetInt32(3); lst.Add(stuavg); } } } return lst; }
对于动态的对ObjectDataSource控件添加参数之前先清空参数：不然参数数据源的SelectParameters会叠加递增的
protected void Page_Load(object sender, EventArgs e) { this.ObjectDataSource1.SelectParameters.Clear(); this.ObjectDataSource1.SelectParameters.Add("name", ""); this.ObjectDataSource1.SelectParameters.Add("sco", "0"); this.ObjectDataSource1.DataBind(); } protected void Button1_Click(object sender, EventArgs e) { this.ObjectDataSource1.SelectParameters.Clear(); string name = this.txtName.Text; string sco = this.txtSco.Text; this.ObjectDataSource1.SelectParameters.Add("name", name); this.ObjectDataSource1.SelectParameters.Add("sco", sco); //Web.BLL.Tran tran = new Web.BLL.Tran(); //List<Web.Model.StudentAvg> lst = tran.GetStudentAvg(name, sco); this.ObjectDataSource1.DataBind(); }
Repeater应用实例：里面的table tr项模版不能是服务端的
<form id="form1" runat="server"> <div> <%-- <table id="lst"> <tr> <td>学号</td> <td>姓名</td> <td>科目</td> <td>分数</td> <td>好学生</td> <td>操作</td> </tr> <%=sb.ToString() %>> </table><asp:LinkButton Visible="false" OnClientClick="Del()" ID="isG" runat="server">设置为好学生</asp:LinkButton>--%> <asp:ObjectDataSource ID="ObjectDataSource1" runat="server" SelectMethod="GetAllStudent" TypeName="Web.BLL.Tran"></asp:ObjectDataSource> <table id="lst"> <tr> <td>学号</td> <td>姓名</td> <td>科目</td> <td>分数</td> <td>好学生</td> <td>操作</td> </tr> <asp:Repeater ID="Repeater1" runat="server" DataSourceID="ObjectDataSource1"> <ItemTemplate> <tr>
// Parameters:
// expression:
// The navigation path from the container to the public property value to
place
// in the bound
control property.
<td><%# Eval("ID") %></td> <td><%# Eval("Name") %></td> <td><%# ((Web.Model.Subject)Eval("SubId")).StuId %></td> <td><%# Eval("Score") %></td> <td> <asp:LinkButton ID="LinkButton1" Enabled=‘<%#!(bool)Eval("IsGoodStudent") %>‘ CommandArgument=‘<%#Eval("ID")%>‘ OnClick="Unnamed_Click" runat="server"> <%#(bool)Eval("IsGoodStudent") ==true ? "好学生" : "设置为好学生" %></asp:LinkButton></td> <td><a href=‘Edit_Student.aspx?id=<%#Eval("ID") %>‘>编辑</a> <a href=‘javascript:Del(<%#Eval("ID") %>);‘>删除</a></td> </tr> </ItemTemplate> </asp:Repeater> </table> <br /><br /><br /> <asp:Panel ID="Panel1" runat="server" GroupingText="学生查询"> <asp:ObjectDataSource ID="ObjectDataSource2" runat="server" SelectMethod="GetAllSubject" TypeName="Web.BLL.Tran"></asp:ObjectDataSource> 姓名：<asp:TextBox ID="txtSName" runat="server"></asp:TextBox><br /> 科目：<asp:DropDownList ID="DropDownList1" runat="server" DataSourceID="ObjectDataSource2" DataTextField="StuId" DataValueField="Id"></asp:DropDownList><br /> 是否是好学生：<asp:CheckBox ID="CheckBox1" runat="server" /> <br /> <asp:Button ID="Button1" runat="server" Text="查询" OnClick="Button1_Click" /> </asp:Panel> </div> </form>
protected void Unnamed_Click(object sender, EventArgs e) { //还原 参数 this.ObjectDataSource1.SelectParameters.Clear(); LinkButton lb = ((LinkButton)sender); if (lb.CommandArgument != "") { if (true)//YEs No 对话框 { string id = lb.CommandArgument; Web.BLL.Tran tran = new Web.BLL.Tran(); if (tran.SetGood(int.Parse(id)) == 1) { this.Repeater1.DataBind(); } } } } protected void Button1_Click(object sender, EventArgs e) { this.ObjectDataSource1.SelectParameters.Clear(); this.ObjectDataSource1.SelectParameters.Add("name", this.txtSName.Text); this.ObjectDataSource1.SelectParameters.Add("sub", this.DropDownList1.SelectedIndex + 1.ToString()); this.ObjectDataSource1.SelectParameters.Add("isG", this.CheckBox1.Checked == true ? "1" : "0"); this.ObjectDataSource1.SelectMethod = "GetWhereStudent"; this.ObjectDataSource1.DataBind(); //this.Page.DataBind(); //this.ObjectDataSource1.SelectMethod = "GetWhereStudent"; }
js界面删除表格行
function DelRow() { var ta = document.getElementById("lst"); var len=ta.rows.length; for (var i = 1; i < len; i++) { var ro = ta.rows.item(i); if (ro.childNodes[0].innerHTML = arguments[0]) { ta.deleteRow(i); return; } } };
ListView下拿后台拿服务端控件值
protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { string id = Request.QueryString["id"]; if (id != null) { //this.ObjectDataSource1.SelectParameters.Add("id", id); this.ObjectDataSource1.SelectParameters[0].DefaultValue = id; this.ObjectDataSource1.DataBind(); } } } protected void Button1_Click(object sender, EventArgs e) { Web.BLL.Tran tran = new Web.BLL.Tran(); string id = ((TextBox)this.ListView1.Items[0].Controls[1]).Text; string name = ((TextBox)this.ListView1.Items[0].Controls[3]).Text; string sub = ((TextBox)this.ListView1.Items[0].Controls[5]).Attributes["MySubID"]; string sco = ((TextBox)this.ListView1.Items[0].Controls[7]).Text; bool isG = ((CheckBox)this.ListView1.Items[0].Controls[9]).Checked; if (1 == tran.EditStudent(id, name, sub, sco, isG)) { this.ObjectDataSource1.DataBind(); Response.Redirect("Manage_Student.aspx"); } }
<body>
<form id="form1" runat="server">
<div>
<asp:ObjectDataSource ID="ObjectDataSource1" runat="server" SelectMethod="GetStudent" TypeName="Web.BLL.Tran">
<SelectParameters>
<asp:Parameter Name="id" Type="Int32" />
</SelectParameters>
</asp:ObjectDataSource>
<br />
<table>
<tr>
<td>学号</td>
<td>姓名</td>
<td>科目</td>
<td>分数</td>
<td>好学生</td>
</tr>
<asp:ListView ID="ListView1" runat="server" DataSourceID="ObjectDataSource1">
<ItemTemplate>
<tr>
<td>
<asp:TextBox ID="TextBox4" disabled="disabled" runat="server" Text=‘<%#Eval("ID") %>‘></asp:TextBox>
</td>
<td>
<asp:TextBox ID="TextBox1" runat="server" Text=‘<%#Eval("Name") %>‘></asp:TextBox></td>
<td>
<asp:TextBox ID="TextBox3" disabled="disabled" MySubID=‘<%#((Web.Model.Subject)Eval("SubId")).Id %>‘ Text=‘<%#((Web.Model.Subject)Eval("SubId")).StuId %>‘ runat="server"></asp:TextBox></td>
<td>
<asp:TextBox ID="TextBox2" runat="server" Text=‘<%#Eval("Score") %>‘></asp:TextBox></td>
<td>
<asp:CheckBox ID="CheckBox1" runat="server" Checked=‘<%#Eval("IsGoodStudent") %>‘ /></td>
</tr>
</ItemTemplate>
</asp:ListView>
</table>
<asp:Button ID="btnSure" OnClick="Button1_Click" runat="server" Text="确定" />
</div>
</form>
服务端控件DropDownList绑定数据
<tr>
<td><input type="text" name="txtName" /></td>
<td>
<asp:DropDownList runat="server" ID="scoName" DataSourceID="ObjectDataSource1" DataTextField="StuId" DataValueField="Id">
</asp:DropDownList></td>
<td><input type="text" name="txtSco" /></td>
<td>
<asp:CheckBox Text="" runat="server" ID="IsGoodStudent" /></td>
</tr>
后台获取服务端控件CheckBox的选择值
bool isGS = this.IsGoodStudent.Checked;
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