获取动态创建的文本框的价值 [英] Get value of dynamically created textbox

问题描述

此刻我有点不高兴，我创建了一些代码，该代码创建了4个文本框，并在运行时将它们添加到表布局中（如下代码），但是我在获取文本方面很挣扎从中，我尝试从中获取值，就像您 string s = TxtBox1.Text.ToString（）; 一样，但是它只是得到一个空引用，然后我尝试了 txt.Text.ToString（）; ，这只是从创建的最后一个文本框中获取文本。

I'm in a bit of a pickle at the moment, I've created a bit of code that creates 4 textboxes and adds them to a table layout at run time (code below) but I'm struggling with getting text from it, I tried getting the value from it as you would string s = TxtBox1.Text.ToString(); but it just gets a null reference, then I tried txt.Text.ToString();and this just gets the text from the last text box that was created.

   private void button2_Click(object sender, EventArgs e)
    {
        int counter;
        for (counter = 1; counter <= 4; counter++)
        {
            // Output counter every fifth iteration
            if (counter % 1 == 0)
            {
                AddNewTextBox();
            }
        }
    }

    public void AddNewTextBox()
    {
        txt = new TextBox();
        tableLayoutPanel1.Controls.Add(txt);
        txt.Name = "TxtBox" + this.cLeft.ToString();
        txt.Text = "TextBox " + this.cLeft.ToString();
        cLeft = cLeft + 1;
    }

我到处都在寻找答案，到目前为止，还没有发现没什么，如果有人有任何想法，我将不胜感激。

I've looked all over for the answers to this and as of yet found nothing if anybody has any ideas I would be grateful.

谢谢

推荐答案

此代码从tableLayoutPanel1中选择textbox1，将其从Control转换为TextBox并采用Text属性：

this code picks textbox1 from tableLayoutPanel1, cast it from Control to TextBox and takes Text property:

string s = ((TextBox)tableLayoutPanel1.Controls["TxtBox1"]).Text;

如果全部需要它们，则遍历文本框：

if you need them all, then iterate over textboxes:

string[] t = new string[4];
for(int i=0; i<4; i++)
    t[i] = ((TextBox)tableLayoutPanel1.Controls["TxtBox"+(i+1).ToString()]).Text;

这篇关于获取动态创建的文本框的价值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！