C# 在WinC窗体中加载用户控件时，将焦点放在文本框中

加载用户控件时如何设置文本框的焦点

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在winforms中，我在usercontrol.load中编写了textbox1.focus，但它不起作用。

试试。改为选择方法

textBox1.Select();

或

或者，您可以尝试：

private TextBox TextFocusedFirstLoop()
{
    // Look through all the controls on this form.
    foreach (Control con in this.Controls)
    {
    // Every control has a Focused property.
    if (con.Focused == true)
    {
        // Try to cast the control to a TextBox.
        TextBox textBox = con as TextBox;
        if (textBox != null)
        {
        return textBox; // We have a TextBox that has focus.
        }
    }
    }
    return null; // No suitable TextBox was found.
}

private void SolutionExampleLoop()
{
    TextBox textBox = TextFocusedFirstLoop();
    if (textBox != null)
    {
    // We have the focused TextBox.
    // ... We can modify or check parts of it.
    }
}

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请尝试。改为选择方法

textBox1.Select();

或

或者，您可以尝试：

private TextBox TextFocusedFirstLoop()
{
    // Look through all the controls on this form.
    foreach (Control con in this.Controls)
    {
    // Every control has a Focused property.
    if (con.Focused == true)
    {
        // Try to cast the control to a TextBox.
        TextBox textBox = con as TextBox;
        if (textBox != null)
        {
        return textBox; // We have a TextBox that has focus.
        }
    }
    }
    return null; // No suitable TextBox was found.
}

private void SolutionExampleLoop()
{
    TextBox textBox = TextFocusedFirstLoop();
    if (textBox != null)
    {
    // We have the focused TextBox.
    // ... We can modify or check parts of it.
    }
}

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