复制客户字段到发货信息字段私有void btn_Click c#

本文关键字：void btn Click 信息字段 字段 客户 复制 | 更新日期: 2023-09-27 18:10:44

我有一个使用c#创建Visual Basic 2008的表单我想添加一个按钮，点击时，它会检查多个字段，如果包含文本，然后粘贴到其他文本框，如果它们是空的这是我目前的代码，但它不工作

 private void btnCopytoBAN_Click(object sender, EventArgs e)
    {
        if (BAddress.Text.Length < 0)
        {BAddress.Text = MAddress.Text;}
        else
        if (BCity.Text.Length < 0)
        {BCity.Text = MCity.Text;}
        else
        if (BState.Text.Length < 0)
        {BState.Text = MState.Text;}
        else
        if (BZIP.Text.Length < 0)
        {BZIP.Text = MZIP.Text;}
        else
        if (BEmail.Text.Length < 0)
        {BEmail.Text = MEmail.Text;}
        else
        if (BName.Text.Length < 0)
        {BName.Text = MFName.Text + " " + MLName.Text;}
        else
        if (TEmail.Text.Length < 0)
        {TEmail.Text = MEmail.Text;}
        else
        if (TName.Text.Length < 0)
        {TName.Text = MFName.Text + " " + MLName.Text;}
        else
        if (MWork.Text.Length < 0)
        if (MWork.Text.Length > 0)
        {BPhone.Text = MWork.Text;
         TPhone.Text = MWork.Text; ;
        }
        else if (MMobile.Text.Length > 0)
        {BPhone.Text = MMobile.Text;
         TPhone.Text = MMobile.Text; ;}
        else if (MHome.Text.Length > 0)
        {BPhone.Text = MHome.Text;
         TPhone.Text = MHome.Text; ;}
    }

复制客户字段到发货信息字段私有void btn_Click c#

文字。长度不能小于0，如果Text为空则可以为0。我想这就是你代码的问题所在。

可以使用String。IsNullOrEmpty代替Text。长度如下。

if (String.IsNullOrEmpty(BAddress.Text)) //(BAddress.Text.Length < 0)
{
    BAddress.Text = MAddress.Text;
}

我对你的if-else语句感到困惑，确保你正确地做了。你没有具体说明你的问题。你的if-else应该像下面这样吗?你真的需要其他条款吗?

if (BAddress.Text.Length = 0)
{BAddress.Text = MAddress.Text;}
if (BCity.Text.Length = 0)
{BCity.Text = MCity.Text;}
if (BState.Text.Length = 0)
{BState.Text = MState.Text;}
if (BZIP.Text.Length = 0)
{BZIP.Text = MZIP.Text;}

...............

if (MWork.Text.Length > 0)
{BPhone.Text = MWork.Text;
 TPhone.Text = MWork.Text;}
if (MMobile.Text.Length > 0)
{BPhone.Text = MMobile.Text;
 TPhone.Text = MMobile.Text;}
if (MHome.Text.Length > 0)
{BPhone.Text = MHome.Text;
 TPhone.Text = MHome.Text;}

感谢大家的帮助，这是我现在使用的工作完美的代码。

     private void btnCopytoBAN_Click(object sender, EventArgs e)
    {
        if (BAddress.Text.Length == 0)
            BAddress.Text = MAddress.Text;
        if (BCity.Text.Length == 0)
            BCity.Text = MCity.Text;
        if (BState.Text.Length == 0)
            BState.Text = MState.Text;
        if (BZIP.Text.Length == 0)
            BZIP.Text = MZIP.Text;
        if (BEmail.Text.Length == 0)
            BEmail.Text = MEmail.Text;
        if (BName.Text.Length == 0)
            BName.Text = MFName.Text + " " + MLName.Text;
        if (TEmail.Text.Length == 0)
            TEmail.Text = MEmail.Text;
        if (TName.Text.Length == 0)
            TName.Text = MFName.Text + " " + MLName.Text;
        if (BPhone.Text.Length == 0)
        {
            BPhone.Text = MWork.Text;
            if (BPhone.Text.Length == 0)
                BPhone.Text = MMobile.Text;
            if (BPhone.Text.Length == 0)
                BPhone.Text = MHome.Text;
        }
        if (TPhone.Text.Length == 0)
        {
            TPhone.Text = MWork.Text;
            if (TPhone.Text.Length == 0)
                TPhone.Text = MMobile.Text;
            if (TPhone.Text.Length == 0)
                TPhone.Text = MHome.Text;
        }
    }
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