在内部函数c#中调用方法[重复]

Question

我想将字符串值从函数传递到内部函数。

private void datagrid_customer_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
    for (int i = 0; i < datagrid_customer.Items.Count; i++)
    {
        if (Convert.ToString((datagrid_customer.SelectedCells[3].Column.GetCellContent(datagrid_customer.SelectedItem) as TextBlock).Text) == Convert.ToString((datagrid_customer.SelectedCells[1].Column.GetCellContent(datagrid_customer.Items[i]) as TextBlock).Text))
        {
            ...
            string a = (b + c + d).ToString();       
        }
 }

我想将a 传递给另一个函数

datagrid_customer.SelectAll();

for (int i = 0; i < datagrid_customer.Items.Count; i++)
{
    if (Convert.ToString((datagrid_customer.SelectedCells[43].Column.GetCellContent(datagrid_customer.Items[i]) as TextBlock).Text) == "0")
    {
        ...
         txt_f1.Text = a ;
    }
}

我需要txt_f1.text = a，但我无权使用a。

我该怎么办？

Answer 1

如果你已经创建了另一个函数，那么你可以将它作为参数传递给你的函数，例如：

int OtherFunction(string a)
{
    // your code here
}

然后简单地调用你的函数：

OtherFunction(a);

如果其他方法不是您创建的方法，例如单击事件方法或其他方法，那么您应该将变量设置为在两个范围内都有效的全局变量：

public string a = ""; // in your main class

然后：

void function1()
{
    //some code
    a = "some value";
    //some code
}


int OtherFunction()
{
    // you have access to a in here to
    textBox1.Text = a;
}

编辑：（在您自己的示例中声明变量的展示）

string a = "";  //declare it here before (outside) method not inside it
private void datagrid_customer_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
    for (int i = 0; i < datagrid_customer.Items.Count; i++)
    {
        if (Convert.ToString((datagrid_customer.SelectedCells[3].Column.GetCellContent(datagrid_customer.SelectedItem) as TextBlock).Text) == Convert.ToString((datagrid_customer.SelectedCells[1].Column.GetCellContent(datagrid_customer.Items[i]) as TextBlock).Text))
        {
            ...
            a = (b + c + d).ToString();       
        }
 }