C# 清除C中的文本框#

我正在用ASP.NET和C#创建一个数独游戏。我需要使用类和继承来完全在代码隐藏页面中构建结构（即在aspx页面上没有asp:TextBox控件）

当我开始一个新游戏时，我正经历着一段艰难的时间，试图让我的输入变得清晰。我生成了一个新的谜题解决方案，但我以前的框不清楚，我已经尝试了我能想到的一切

下面是与问题相关的几段代码。



构建拼图并将其存储在拼图对象中的代码。

private Puzzle newPuzzle(int[,] solution, int numbersVisible, int  maxNumbersPerBox, int maxOccurancesPerNumber)
{
    Puzzle newPuzzle = new Puzzle();
    SudokuTextBox newTextbox;
    Number newNumber;

    Random randomRC = new Random();

    //variable to hold the correct answer at the given location
    int answer;
    //variables to hold the location within the answers array
    int rowLoc;
    int colLoc;
    //counter to count the number of times we while loop
    int counter = 0;
    //variables to hold the randomly-chosen rows & col values
    int row;
    int col;
    //array to hold the positions of the numbers we are going to show
    string[] show;
    show = new string[numbersVisible];

    while(counter < numbersVisible)
    {
        //generate random numbers that gives us the location of the numbers in the solution array that we are going to show
        row = randomRC.Next(0, 9);
        col = randomRC.Next(0, 9);

        //if the random numbers are not already in the array
        if (!show.Contains(row.ToString() + ":" + col.ToString()))
        {
            //add them to the array
            show[counter] = row.ToString() + ":" + col.ToString();

            //increase the counter
            counter++;
        } //end if...contains

    } //end while


    // BUILDING THE PUZZLE
    //start looping through the puzzle rows
    for (int pr = 0; pr < 3; pr++)
    {
        //another loop for puzzle columns
        for (int pc = 0; pc < 3; pc++)
        {
            box = new Box();                //create a new Box object
            //another loop for box rows
            for (int br = 0; br < 3; br++)
            {
                //another loop for box columns
                for (int bc = 0; bc < 3; bc++)
                {
                    newTextbox = new SudokuTextBox();
                    newNumber = new Number();

                    //grab the answer to this particular SudokuTextBox from the solutions array
                    rowLoc = (pr + br + (2 * pr));
                    colLoc = (pc + bc + (2 * pc));
                    answer = solution[rowLoc, colLoc];
                    newNumber.setNumber(answer);                       //set the Number to the found answer
                    newTextbox.setTextBoxValue(newNumber);             //fill in the textbox with Number

                    //if this SudokuTextBox is chosen to be given at the start of the puzzle
                    if (show.Contains((rowLoc + ":" + colLoc).ToString()))
                    {
                        //make this SudokuTextBox visible
                        newTextbox.setVisibility(true);
                    }
                    else {
                        newTextbox.setVisibility(false);
                    } //end if

                    box.setItem(newTextbox, br, bc);                   //add the SudokuTextBox to the correct position inside Box
                } //end box column loop
            } //end box row loop
            newPuzzle.setItem(box, pr, pc);        //add the Box to the correct position inside Puzzle
        } //end puzzle column loop
    } //end puzzle row loop

    return newPuzzle;
} //end easy()

构建表格结构、用存储在拼图中的答案填充表格并将其添加到aspx页面的代码：

//when the Easy button is pressed
protected void btnEasy_Click(object sender, EventArgs e)
{
    //generate a new random number
    Random newRandomSoln = new Random();


    //keep picking new solutions until we get one that's different than the last one
    do
    {
        solution = chooseSolution(newRandomSoln.Next(1, 11));
    }
    while (solution == Session["solution"]);

    //store the new solution
    Session["solution"] = solution;

    //generate a new puzzle
    Session["puzzle"] = newPuzzle( (int[,])Session["solution"], 32, 4, 4 );
}

    ////////////////////////////////
    // CREATING THE PUZZLE
    ///////////////////////////////
    Table structure = new Table();      //table to be the outer structure of the puzzle
    TableRow row;                       //row variable to make new rows
    TableCell cell;                     //cell variable to make new cells
    Table boxTable;                     //table that will hold individual Boxes
    TableRow boxRow;                    //row that will hold 3 SudokuTextBoxes
    TableCell boxCell;                  //cell that will hold a single SudokuTextBoxes
    TextBox input;                      //textbox that will hold the textbox in SudokuTextBox
    int answer;                         //int to hold the answer to a particular textbox


    //start looping through the puzzle rows
    for (int pr = 0; pr < 3; pr++)
    {
        row = new TableRow();           //create a new outer row

        //another loop for puzzle columns
        for (int pc = 0; pc < 3; pc++)
        {
            cell = new TableCell();         //create a new outer cell
            boxTable = new Table();         //create a new inner table
            box = new Box();                //create a new Box object

            box = ((Puzzle)Session["puzzle"]).getItem(pr, pc);   //find the box at the current location in the puzzle

            //another loop for box rows
            for (int br = 0; br < 3; br++)
            {
                boxRow = new TableRow();    //create a new inner row

                //another loop for box columns
                for(int bc = 0; bc < 3; bc++)
                {
                    boxCell = new TableCell();                      //create a new inner cell
                    textbox = new SudokuTextBox();                  //create a new SudokuTextBox object

                    textbox = box.getItem(br, bc);                  //find the SudokuTextBox at the current location in the box
                    //grab the answer to this particular SudokuTextBox from the solutions array
                    answer = ((int[,])Session["solution"])[ (pr + br + (2 * pr)), (pc + bc + (2 * pc)) ];

                    input = textbox.getTextBox();                   //grab the textbox inside SudokuTextBox and store it
                    input.MaxLength = 1;                            //only allow 1 character to be typed into the textbox
                    //give the textbox an ID so we can find it later
                    input.ID = ("tb" + (pr + br + (2 * pr)) + "_" + (pc + bc + (2 * pc))).ToString();

                    boxCell.Controls.Add(input);                    //add the textbox to the inner cell
                    boxRow.Controls.Add(boxCell);                   //add the inner cell to the inner row
                } //end box column loop

                boxTable.Controls.Add(boxRow);  //add the inner row to the inner table

            } //end box row loop
            cell.Controls.Add(boxTable);        //add the inner table to the outer cell
            row.Controls.Add(cell);             //add the outer cell to the outer row
        } //end puzzle column loop
        structure.Controls.Add(row);            //add the outer row to the outer table
    } //end puzzle row loop

    pnlPuzzle.Controls.Add(structure);

    ////////////////////////////////
    // end puzzle
    ///////////////////////////////

public class SudokuTextBox
{
private System.Web.UI.WebControls.TextBox textbox;
private bool visible;
private Number number;

public SudokuTextBox()
{
    textbox = new System.Web.UI.WebControls.TextBox();
    visible = false;
    number = new Number();
} //end constructor

//function to make a new textbox
public System.Web.UI.WebControls.TextBox getTextBox()
{
    return textbox;
}

//function to get the value of a textbox
public Number getTextBoxValue()
{
    return number;
}

//????????????
public void setTextBoxValue(Number newNumber)
{
    this.number.setNumber(newNumber.getNumber());
}

//function to get the visibility of a textbox
public bool getVisibility()
{
    return visible;
}

//function to change the visibility of a textbox
public void setVisibility(bool newVisible)
{
    if (newVisible)
    {
        //if the textbox is visible
        //get the number
        //and make it disabled
        textbox.Text = number.getNumber().ToString();
        textbox.ReadOnly = true;
        textbox.BackColor = System.Drawing.Color.FromArgb(150, 148, 115);
    } else
    {
        //if it is not visible
        //hide the number
        //and make it enabled
        textbox.ReadOnly = false;
        textbox.Text = "";
        textbox.BackColor = System.Drawing.Color.White;
    }
}

//function to change the color of the textbox if it is wrong
public void setWrongNumber()
{
    textbox.BackColor = System.Drawing.Color.FromArgb(5, 156, 202, 252);
}

//function to change the color of the textbox if it is correct
public void setCorrectNumber()
{
    //but don't change disable text boxes
    if(textbox.ReadOnly != true)
    {
        textbox.BackColor = System.Drawing.Color.White;
    }
}

//function to change the color of the textbox if it is blank
public void setBlankNumber()
{
    //but don't change disable text boxes
    if (textbox.ReadOnly != true)
    {
        textbox.BackColor = System.Drawing.Color.White;
    }
}

//function to show the value of a textbox when clicking the "Hint" button
//also changes the color of the textbox so we know it was shown with a hint
public void setHint()
{
    setVisibility(true);
}

} //end class

---

谢谢所有给你两分钱的人。我只是想让大家知道我已经解决了这个问题：

我最终分离出构建表结构的代码，将其从pageu加载中取出，并将其放入自己的函数中。然后，我从Page_Load调用了这个函数。当我点击“新建拼图”按钮时，我也调用了这个函数。我还添加了类似于上面所述的逻辑，以在构建新表之前清除先前的表结构：

foreach(Control c in pnlPuzzle.Controls){

    pnlPuzzle.Controls.Remove(c);
}

---

我不太清楚为什么这解决了我的问题，但它起了作用

这是很多代码，但我没有看到应该用来清除以前的谜题并生成新谜题的代码。这可能有一个很好的答案：@CodingGorilla我也会更新以显示该代码。@B.ClayShannon我尝试了各种各样的变化。它似乎无法识别容器中的文本框。我可以在foreach中打印字符串，但不能在if（控件为TextBox）中打印。我看不到相关代码，但如果您试图将SudokuTextBox与（控件为TextBox）进行比较，则它不是一个字符串，因此它不会为此计算为true。