Question

作为我正在尝试的练习的一部分，它用于父母会议日，我想在那里显示会议桌，小时旁边有一个单选按钮，所以学生可以登录将自己嵌入他想要的时间。

所以我有一个表格控件，我从数据库 MeetingsTable 动态构建，其中包含以下列：

meetingHour
meetingDate
MeetingPlace的
studentID

背后的代码如下所示：（其中一些是希伯来语所以忽略它）

public string error = "";//Initialize error string
protected void Page_Load(object sender, EventArgs e)
{
    if (!Page.IsPostBack)
    {
        MultiView1.ActiveViewIndex = 0;
    }
    string fileName = "ParentsDayDB.accdb";
    string selectQuery = "SELECT * FROM Meetings";
    DataBindMeetingsTable(fileName, selectQuery);

}

protected void IDButton_Click(object sender, EventArgs e)
{
    string studentID = IDTextBox.Text;
    string pattern = @"^\d{9}$";
    Regex reg = new Regex(pattern);
    if (reg.IsMatch(studentID))
    {
        string fileName = "ParentsDayDB.accdb";
        string selectQuery = "SELECT * FROM Students WHERE studentID = '" + studentID + "'";
        if (MyAdoHelper.IsExist(fileName, selectQuery))
        {
            DataTable table = MyAdoHelper.ExecuteDataTable(fileName, selectQuery);
            string studentName = (string)table.Rows[0]["studentName"];
            string studentClass = (string)table.Rows[0]["studentClass"];
            string parentName = (string)table.Rows[0]["parentName"];
            Student student = new Student(studentID, studentClass, studentName, parentName);
            Session["student"] = student;
            if ((bool)table.Rows[0]["isAdmin"] == true)
            {
                Session["isAdmin"] = "true";
            }
            MultiView1.ActiveViewIndex = 1;
        }
        else
        {
            error = "<hr align=\"right\" width=\"230px\" /> תעדות הזהות לא קיימת";
        }
    }
    else
    {
        error = "<hr align=\"right\" width=\"440px\" /> אנא הכנס תעודת זהות תקינה בעלת 9 ספרות";
    }
}


public void DataBindMeetingsTable(string fileName, string selectQuery)
{

    DataTable dt = MyAdoHelper.ExecuteDataTable(fileName, selectQuery);
    //הוספת הכותרות
    TableRow tr = new TableRow();
    TableCell tc = new TableCell();
    tc.Text = "שעה";
    tr.Cells.Add(tc);
    tc = new TableCell();
    tc.Text = "תאריך";
    tr.Cells.Add(tc);
    tc = new TableCell();
    tc.Text = "מיקום";
    tr.Cells.Add(tc);
    tc = new TableCell();
    tc.Text = "ת.ז. תלמיד";
    tr.Cells.Add(tc);
    MeetingsTable.Rows.Add(tr);

    //הוספת הנתונים לטבלה
    int numCols = dt.Columns.Count;
    int radioIndex = 1;
    foreach (DataRow dr in dt.Rows)
    {
        tr = new TableRow();
        for (int i = 0; i < numCols; i++)
        {
            object item = dr.ItemArray[i];
            TableCell c = new TableCell();
            c.BorderWidth = 1;
            if (i == 0)//אם בתא צריך להיות כפתור של שעה
            {
                RadioButton r = new RadioButton();
                r.Text = item.ToString();
                r.AutoPostBack = true;
                r.GroupName = "radioButtonList";
                c.Controls.Add(r);
                c.CssClass = "radioButtonCell";
            }
            else //אם התא הוא רגיל ורק צריך להציג בו מידע
                c.Text = item.ToString();
            tr.Cells.Add(c);
        }
        radioIndex++;
        MeetingsTable.Rows.Add(tr);
    }
}

public string GetRadioValue(ControlCollection controls, string groupName)// return the value of the selected radio button, empty string if nothing is selected.
{
    // using Language Intergrated Query (LINQ) in order to find the radio button that is selected in the groupName.
    var selectedRadioButton = controls.OfType<RadioButton>().FirstOrDefault(rb => rb.GroupName == groupName && rb.Checked);
    return selectedRadioButton == null ? string.Empty : selectedRadioButton.Attributes["Value"]; //trinary operator (shortcut of an if expresison)
}


protected void meetButton_Click(object sender, EventArgs e)
{
    //string radioValue = RadioButtonList1.SelectedValue;
    //string radioValue = GetRadioValue(form1.Controls, "radioButtonList");
    string radioValue = GetRadioValue(form1.Controls, "radioButtonList")
    if (!radioValue.Equals("")) // אם נבחרה שעה
    {
        string hour = radioValue;
        Student student = (Student)Session["Student"];
        string id = student.StudentID;
        if (MeetingHelper.Meet(hour, id))
            promptLabel.Text = "הפגישה נקבעה בהצלחה";
        else
            promptLabel.Text = "השעה שבחרת תפוסה, בחר שעה אחרת";
    }
    else
        promptLabel.Text = "בחר שעה";
}

页面如下所示： screenshot

问题是，当我点击嵌入式会议按钮时，它将找不到所选的单选按钮，调试后我发现我发送的控件集合有问题，所以我试着发送这个.Controls或者只是使用控件。没有帮助。

虽然我可以使用单选按钮列表控件，并访问所选的值属性，但我无法按照我想要的方式显示它，每个单选按钮位于一个单独的行中，其他列添加到生成表（或其他一些技巧，以产生相同的结果）。

我有所需的所有使用电话：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Text.RegularExpressions;

我真的很沮丧，请赐教！

MyAdoHelper类与此问题无关，因为它甚至没有进入按钮点击调用中的if语句，所以我排除了它。

Answer 1

您可以通过以下方式阅读所选的单选按钮文本：

public string GetRadioValue(ControlCollection controls, string groupName)// return the value of the selected radio button, empty string if nothing is selected.
{
    // using Language Intergrated Query (LINQ) in order to find the radio button that is selected in the groupName.
    var selectedRadioButton = controls.OfType<RadioButton>().FirstOrDefault(rb => rb.GroupName == groupName && rb.Checked);
    return selectedRadioButton == null ? string.Empty : selectedRadioButton.Text; //trinary operator (shortcut of an if expresison)
}

并调用方法

string text = GetRadioValue(form1.Controls, "RadioGroupName"); //where form1 is your container id.

和asp:RadioButton看起来像

<asp:RadioButton ID="radio1" Text="Text for radio button" runat="server" GroupName="RadioGroupName" />

Answer 2

调试后，我意识到我没有包含所有radioButton控件的控件所有者或控件容器。因此使用LINQ是无关紧要的，我使用以下代码来获取Table控件中所选radioButton的radioValue：

public string GetRadioValue()
{
    string radioValue = "";
    foreach (TableRow dr in MeetingsTable.Rows)
    {
        int countControls = dr.Cells[0].Controls.Count;
        if (countControls != 0)
        {
            RadioButton r = dr.Cells[0].Controls[0] as RadioButton;
            if (r.Checked)
                radioValue = r.Text;
        }
    }
    return radioValue;
}

获取同一组名称中的单选按钮值

2 个答案: