如何在 C# 中检查和更改名称按钮 Windows Phone
How to check and change name button in C# Windows Phone
我有一个问题,我正在 Windows Phone 上用按钮做一个简单的游戏:
<Button x:Name="ba0" Content=" " HorizontalAlignment="Left" Height="126" Margin="37,146,0,0" VerticalAlignment="Top" Width="126" Click="a0"/>
如果按钮上有“”,我想更改按钮的内容,如果有 "X" 或 "O",我不想更改。我写了类似的东西:
public void a0(object sender, System.EventArgs e)
{
if (ba0.Content == " ")
ba0.Content = "X";
else
return;
}
但它不能正常工作。有什么想法吗?
试试下面的代码:
<Button x:Name="ba0" HorizontalAlignment="Left" Height="126" Margin="37,146,0,0" VerticalAlignment="Top" Width="126" Click="a0"/>
public void a0(object sender, System.EventArgs e)
{
if (string.IsNullOrEmpty(Convert.ToString(ba0.Content)))
ba0.Content = "X";
else
return;
}
尝试以下方法
Convert the content into string type and also trim the value.
public void a0(object sender, System.EventArgs e)
{
if (string.IsNullOrEmpty(Convert.ToString(ba0.Content).Trim()))
ba0.Content = "X";
else
return;
}
or check for white spaces
public void a0(object sender, System.EventArgs e)
{
var content = Convert.ToString(ba0.Content);
if (string.IsNullOrEmpty(content) || string.IsNullOrWhiteSpace(content))
ba0.Content = "X";
else
return;
}
我有一个问题,我正在 Windows Phone 上用按钮做一个简单的游戏:
<Button x:Name="ba0" Content=" " HorizontalAlignment="Left" Height="126" Margin="37,146,0,0" VerticalAlignment="Top" Width="126" Click="a0"/>
如果按钮上有“”,我想更改按钮的内容,如果有 "X" 或 "O",我不想更改。我写了类似的东西:
public void a0(object sender, System.EventArgs e)
{
if (ba0.Content == " ")
ba0.Content = "X";
else
return;
}
但它不能正常工作。有什么想法吗?
试试下面的代码:
<Button x:Name="ba0" HorizontalAlignment="Left" Height="126" Margin="37,146,0,0" VerticalAlignment="Top" Width="126" Click="a0"/>
public void a0(object sender, System.EventArgs e)
{
if (string.IsNullOrEmpty(Convert.ToString(ba0.Content)))
ba0.Content = "X";
else
return;
}
尝试以下方法
Convert the content into string type and also trim the value.
public void a0(object sender, System.EventArgs e)
{
if (string.IsNullOrEmpty(Convert.ToString(ba0.Content).Trim()))
ba0.Content = "X";
else
return;
}
or check for white spaces
public void a0(object sender, System.EventArgs e)
{
var content = Convert.ToString(ba0.Content);
if (string.IsNullOrEmpty(content) || string.IsNullOrWhiteSpace(content))
ba0.Content = "X";
else
return;
}