[英]How to get dynamically created textbox value
我想在asp.net中獲得動態創建的文本框值
這是我在此代碼文本框中創建的代碼,但是當我在文本中輸入值並從動態創建的文本框中檢索值時,它給出了錯誤
你調用的對象是空的
下面是我的代碼...
protected void Page_Init(object sender, EventArgs e)
{
if (!IsPostBack)
{
//Generate initial textboxes
GenerateButton_Click(sender, e);
}
}
protected void GenerateButton_Click(object sender, EventArgs e)
{
//Generate textboxes
int z = int.Parse(HowManyToGenerateTextBox.Text);
Panel1.Controls.Clear();
for (int i = 0; i < z; i++)
{
TextBox s = new TextBox();
s.ID = "tb" + i.ToString();
Session[s.ID] = s;
Panel1.Controls.Add(s);
}
}
protected void CalculateButton_Click(object sender, EventArgs e)
{
//Calculate sum
int sum = 0;
for (int i = 0; i < Session.Count; i++)
{
TextBox txt = (TextBox)Panel1.FindControl("tb" + i.ToString());
ResultLabel.Text = txt.Text;
if (ResultLabel.Text != null)
sum += int.Parse(ResultLabel.Text);
}
ResultLabel.Text = sum.ToString();
}
我認為問題出在這方面
for (int i = 0; i < Session.Count; i++)
會話始終包含其他參數
在GenerateButton_Click
方法中將Session.Count
與z
進行比較。 我想他們是不同的
你好朋友,這是答案
protected void Page_Load(object sender, EventArgs e)
{
if (Page.IsPostBack)
GenerateButton_Click(sender, e);
}
public TextBox[] s;
protected void GenerateButton_Click(object sender, EventArgs e)
{
int z = Convert.ToInt32(HowManyToGenerateTextBox.Text);
Panel1.Controls.Clear();
Array.Resize(ref s, z);
for (int i = 0; i < z; i++)
{
s[i] = new TextBox();
s[i].ID = "tb" + i.ToString();
s[i].Text = "tb" + i.ToString();
Session[s[i].ID] = s;
Panel1.Controls.Add(s[i]);
}
}
protected void CalculateButton_Click(object sender, EventArgs e)
{
ResultLabel.Text = s[0].Text;
}
這也是代碼http://www.codeproject.com/Questions/854773/How-to-get-dynamically-created-textbox-value
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.