MaskedTextBox 最小/最大长度

发布于 2024-10-15 16:57:20 字数 260 浏览 2 评论 0原文

我有一个蒙版文本框，需要在其上设置最小/最大长度。当满足这些条件时，按钮将被启用。

我正在考虑处理 TextChanged 事件来确定输入文本的长度并设置按钮启用值。

有更好的方法吗？

 btnOK.Enabled = txtDataEntry.Text.Length >= MinDataLength && txtDataEntry.Text.Length <= MaxDataLength;

原文

I have a masked textbox with the need to have a min/max length set on them. When these conditions are met a button becomes enabled.

I was thinking of handling the TextChanged event to determine the length of the entered text and set the buttons enabled value.

Is there a better approach?

 btnOK.Enabled = txtDataEntry.Text.Length >= MinDataLength && txtDataEntry.Text.Length <= MaxDataLength;

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梦明 2024-10-22 16:57:20

哪种方法可能比您建议的更简单？

myTextBox.Textchanged+=(s,o)=>{ myButton.Enabled = myTextBox.Length==10; };

Which approach could be even simpler than what you are suggesting?

myTextBox.Textchanged+=(s,o)=>{ myButton.Enabled = myTextBox.Length==10; };

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尝蛊 2024-10-22 16:57:20

IMO TextChanged 事件是处理此功能条件的好地方。

更新

在 KeyPress 事件中执行此操作，如下所示：

maskedtxtbox.KeyPress => (s , ev ) { 
                    if(maskedtxtbox.Length > 9)
                    {
                       //This prevent from key to go to control
                       e.Handled =true;
                       button1.Enabled = true;
                    } 
                 };

IMO TextChanged event is good place to handle this feature condition.

Update

Do it in KeyPress event like this:

maskedtxtbox.KeyPress => (s , ev ) { 
                    if(maskedtxtbox.Length > 9)
                    {
                       //This prevent from key to go to control
                       e.Handled =true;
                       button1.Enabled = true;
                    } 
                 };

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等往事风中吹 2024-10-22 16:57:20

// 在你的 texbox 验证事件中

    private void textBox4_Validating(object sender, CancelEventArgs e)
    {
        TextBox tb = sender as TextBox;
        if (tb != null)
        {
            int i=tb.Text.Length;
            //Set your desired minimumlength here '7'
            if (i<7)
            {

                MessageBox.Show("Too short Password");
                return;

            }
        }
        else

        e.Cancel = true;
    }

// At your texbox valdating Event

    private void textBox4_Validating(object sender, CancelEventArgs e)
    {
        TextBox tb = sender as TextBox;
        if (tb != null)
        {
            int i=tb.Text.Length;
            //Set your desired minimumlength here '7'
            if (i<7)
            {

                MessageBox.Show("Too short Password");
                return;

            }
        }
        else

        e.Cancel = true;
    }

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~没有更多了~