運行時文本框創建創建問題

Question

此代碼對前兩次正常工作，即，當我點擊「添加更多解決方案」時，它分別創建一個新行和控件，但當我點擊第三次「添加更多解決方案」和「添加步驟」按鈕，它會產生問題。

protected void Page_Load(object sender, EventArgs e) 
{ 

     for (int i = 0; i < TotalNumberAdded; i++) 
     { 
      AddControls((i + 1), plcSolution); 
     } 
     for (int i = 0; i < TotalNumberSolAdded; i++) 
     { 

      AddMoreControls((i + 1), plcAddMoreSolution, 1); 
      Button b = (Button)plcAddMoreSolution.FindControl("btn" + (i+1)); 

      for (int j = 0; j < TotalNumberSolStepAdded; j++) 
      { 

       AddMoreStepControls((j + 1), plcAddMoreSolution); 
      } 
     } 


} 



protected void btnAdd_Click(object sender, EventArgs e) 
{ 


     TotalNumberAdded++; 
     AddControls(TotalNumberAdded, plcSolution); 

} 
private void AddControls(int controlNumber, PlaceHolder plc) 
{ 
     TextBox txtBoxSolution = new TextBox(); 
     Label lblSolution = new Label(); 

     txtBoxSolution.ID = "txtBoxSolution" + controlNumber; 
     txtBoxSolution.TextMode = TextBoxMode.MultiLine; 

     txtBoxSolution.Width = 470; 
     txtBoxSolution.Height = 50; 
     lblSolution.ID = "lblSolution" + controlNumber; 

     lblSolution.Text = "Step " + (controlNumber + 1) + ": "; 
     lblSolution.Width = 200; 


     plc.Controls.Add(lblSolution); 

     plc.Controls.Add(txtBoxSolution); 



} 

protected int TotalNumberAdded 
{ 

    get { return (int)(ViewState["TotalNumberAdded"] ?? 0); } 
    set { ViewState["TotalNumberAdded"] = value; } 
} 


protected void btnAlternate_Click(object sender, EventArgs e) 
{ 
    lblSol.Text = "Solution 1"; 
    string str = (string)ViewState["btnId"]; 
    if (str != null) 
    { 
     btn = (Button)plcAddMoreSolution.FindControl(str); 

     btn.Visible = false; 

    } 

    btnAdd.Visible = false; 
    TotalNumberSolAdded++; 
    AddMoreControls(TotalNumberSolAdded, plcAddMoreSolution,1); 

} 
protected int TotalNumberSolAdded 
{ 

    get { return (int)(ViewState["TotalNumberSolAdded"] ?? 0); } 
    set { ViewState["TotalNumberSolAdded"] = value; } 
} 
private void AddMoreControls(int controlNumber, PlaceHolder plc,int n) 
{ 

     TextBox txtBoxMoreSolution = new TextBox(); 

     Label lblMoreSolution = new Label(); 
     btn = new Button(); 
     btn.Text = "add step"; 
     btn.ID = "btn" + controlNumber; 
     btn.Click += new EventHandler(btn_Click); 
     ViewState["btnId"] = btn.ID; 
     Label lbl = new Label(); 
     lbl.Text = "soltuion" + (controlNumber + 1); 
     lbl.ID = "moreSolution" + (controlNumber + 1); 
     lbl.Font.Size = 20; 
     lbl.Font.Underline = true; 

     txtBoxMoreSolution.ID = "txtBoxMoreSolution" + controlNumber; 
     txtBoxMoreSolution.TextMode = TextBoxMode.MultiLine; 

     txtBoxMoreSolution.Width = 470; 
     txtBoxMoreSolution.Height = 50; 
     lblMoreSolution.ID = "lblMoreSolution" + controlNumber; 

     lblMoreSolution.Text = "Step " + n + ": "; 
     lblMoreSolution.Width = 200; 



     plc.Controls.Add(lbl); 

     plc.Controls.Add(lblMoreSolution); 

     plc.Controls.Add(txtBoxMoreSolution); 

     plc.Controls.Add(btn); 



} 

private void btn_Click(object sender, EventArgs e) 
{ 
    TotalNumberSolStepAdded++; 
    AddMoreStepControls(TotalNumberSolStepAdded, plcAddMoreSolution); 
} 

protected int TotalNumberSolStepAdded 
{ 

    get { return (int)(ViewState["TotalNumberSolStepAdded"] ?? 0); } 
    set { ViewState["TotalNumberSolStepAdded"] = value; } 
} 

private void AddMoreStepControls(int controlNumber, PlaceHolder plc) 
{ 

     TextBox txtBoxMoreStepSolution = new TextBox(); 
     Label lblMoreStepSolution = new Label(); 

     txtBoxMoreStepSolution.ID = "txtBoxMoreStepSolution" + controlNumber; 
     txtBoxMoreStepSolution.TextMode = TextBoxMode.MultiLine; 

     txtBoxMoreStepSolution.Width = 470; 
     txtBoxMoreStepSolution.Height = 50; 
     lblMoreStepSolution.ID = "lblMoreStepSolution" + controlNumber; 

     lblMoreStepSolution.Text = "Step " + (controlNumber +1) + ": "; 
     lblMoreStepSolution.Width = 200; 


     plc.Controls.Add(lblMoreStepSolution); 

     plc.Controls.Add(txtBoxMoreStepSolution); 


} 

Answer 1

這個代碼將幫助你..它工作正常...

protected void Page_Load(object sender, EventArgs e) 
    { 

    for (int i = 0; i < TotalNumberAdded; i++) 
    { 
     AddControls(i + 1); 
    } 
    for (int i = 0; i < TotalNumberSolAdded; i++) 
    { 
     AddMoreControls((i + 1), 1); 
     DataTable dt = (DataTable)ViewState["t"]; 
     if (dt != null) 
     { 
      if ((TotalNumberSolAdded - dt.Rows.Count == 1) && (counter1 == dt.Rows.Count)) 
      { 
       break; 
      } 
      if (i != 0) 
      { 
       for (int k = 0; k <= i; k++) 
       { 
        int a1 = int.Parse(dt.Rows[k][0].ToString()); 
        b = a1 + b; 

       } 
       start = b - int.Parse(dt.Rows[i][0].ToString()); 
      } 
      else 
      { 
       b = int.Parse(dt.Rows[i][0].ToString()); 
       start = 0; 
      } 
      for (int j = start; j < b; j++) 
      { 
       counter++; 
       AddMoreStepControls((j + 1), counter); 
      } 
      b = 0; 
      counter = 0; 
      counter1++; 
     } 
    } 

} 

private void AddControls(int controlNumber) 
    { 
    TextBox txtBoxSolution = new TextBox(); 
    Label lblSolution = new Label(); 

    txtBoxSolution.ID = "txtBoxSolution" + controlNumber; 
    txtBoxSolution.TextMode = TextBoxMode.MultiLine; 

    txtBoxSolution.Width = 470; 
    txtBoxSolution.Height = 50; 
    lblSolution.ID = "lblSolution" + controlNumber; 

    lblSolution.Text = "Step " + (controlNumber + 1) + ": "; 
    lblSolution.Width = 200; 


    plcSolution.Controls.Add(lblSolution); 

    plcSolution.Controls.Add(txtBoxSolution); 

     } 
protected int TotalNumberAdded 
    { 

     get { return (int)(ViewState["TotalNumberAdded"] ?? 0); } 
     set { ViewState["TotalNumberAdded"] = value; } 
    } 
protected void btnAlternate_Click(object sender, EventArgs e) 
    { 

     Number = 0; 
     lblSol.Text = "Solution 1"; 
     string str = (string)ViewState["btnId"]; 
     if (str != null) 
     { 
      btn = (Button)plcAddMoreSolution.FindControl(str); 
      btn.Visible = false; 
     } 
     btnAdd.Visible = false; 
     TotalNumberSolAdded++; 
     AddMoreControls(TotalNumberSolAdded, 1); 
     } 
    protected int TotalNumberSolAdded 
     { 
      get { return (int)(ViewState["TotalNumberSolAdded"] ?? 0); } 
      set { ViewState["TotalNumberSolAdded"] = value; } 
     } 
    private void AddMoreControls(int controlNumber, int n) 
     { 

     TextBox txtBoxMoreSolution = new TextBox(); 
     Label lblMoreSolution = new Label(); 
     btn = new Button(); 
     btn.Text = "add step"; 
     btn.ID = "btn" + controlNumber; 
     btn.Click += new EventHandler(btn_Click); 
     ViewState["btnId"] = btn.ID; 
     Label lbl = new Label(); 
     lbl.Text = "Soltuion" + (controlNumber + 1); 
     lbl.ID = "moreSolution" + (controlNumber + 1); 
     lbl.Font.Size = 20; 
     lbl.Font.Underline = true; 
     lbl.Font.Bold = true; 
     txtBoxMoreSolution.ID = "txtBoxMoreSolution" + controlNumber; 
     txtBoxMoreSolution.TextMode = TextBoxMode.MultiLine; 

     txtBoxMoreSolution.Width = 470; 
     txtBoxMoreSolution.Height = 50; 
     lblMoreSolution.ID = "lblMoreSolution" + controlNumber; 

     lblMoreSolution.Text = "Step " + n + ": "; 
     lblMoreSolution.Width = 200; 


     plcAddMoreSolution.Controls.Add(lbl); 

     plcAddMoreSolution.Controls.Add(lblMoreSolution); 

     plcAddMoreSolution.Controls.Add(txtBoxMoreSolution); 

     plcAddMoreSolution.Controls.Add(btn); 


     } 
    private void btn_Click(object sender, EventArgs e) 
     { 
      TotalNumberSolStepAdded++; 
      Number++; 
      string str = (string)ViewState["btnId"]; 
      if (str != null) 
     { 
      string resultString = Regex.Match(str, @"\d+").Value; 
      a = int.Parse(resultString); 
      table = (DataTable)ViewState["t"]; 
      if (table == null) 
      { 
       DataTable table1 = new DataTable(); 
       table1.Columns.Add("count", typeof(int)); 
       dr = table1.NewRow(); 
       table1.Rows.Add(dr); 
       table1.Rows[a - 1]["count"] = Number; 
       table1.AcceptChanges(); 
       ViewState["t"] = table1; 
      } 
      else 
      { 
       if (a != table.Rows.Count) 
       { 
        dr = table.NewRow(); 
        table.Rows.Add(dr); 
       } 
       table.Rows[a - 1]["count"] = Number; 
       table.AcceptChanges(); 
       ViewState["t"] = table; 
      } 
     } 


     AddMoreStepControls(TotalNumberSolStepAdded, Number); 
    } 
protected int TotalNumberSolStepAdded 
    { 
     get { return (int)(ViewState["TotalNumberSolStepAdded"] ?? 0); } 
     set { ViewState["TotalNumberSolStepAdded"] = value; } 
    } 

    protected int Number 
    { 
     get { return (int)(ViewState["Number"] ?? 0); } 
     set { ViewState["Number"] = value; } 
    } 

    private void AddMoreStepControls(int controlNumber, int counter) 
    { 

     TextBox txtBoxMoreStepSolution = new TextBox(); 
     Label lblMoreStepSolution = new Label(); 

     txtBoxMoreStepSolution.ID = "txtBoxMoreStepSolution" + controlNumber; 
     txtBoxMoreStepSolution.TextMode = TextBoxMode.MultiLine; 

     txtBoxMoreStepSolution.Width = 470; 
     txtBoxMoreStepSolution.Height = 50; 
     lblMoreStepSolution.ID = "lblMoreStepSolution" + controlNumber; 

     lblMoreStepSolution.Text = "Step " + (counter + 1) + ": "; 
     lblMoreStepSolution.Width = 200; 


     plcAddMoreSolution.Controls.Add(lblMoreStepSolution); 

     plcAddMoreSolution.Controls.Add(txtBoxMoreStepSolution); 




    }