将值传递给处理程序

Question

我有这样的代码：

private void button1_Click(object sender, EventArgs e)
{
    openFileDialog1.ShowDialog();
}
private void openFileDialog1_FileOk(object sender, CancelEventArgs e)
{ 
    string ext = Path.GetExtension(openFileDialog1.FileName);
    if(string.Compare(ext, ".FDB") == 0)
    {
        string fileName = openFileDialog1.SafeFileName;
        string fileDirectory = Path.GetDirectoryName(openFileDialog1.FileName);
        string databaseTxt = @"C:\Users\arist\AppData\Roaming\TDWork\";
        string[] database = { fileDirectory + fileName };
        if (Directory.Exists(databaseTxt))
        {
            System.IO.File.WriteAllLines(databaseTxt + "databases.txt", database);
        }
        else
        {
            DirectoryInfo di = Directory.CreateDirectory(databaseTxt);
            System.IO.File.WriteAllLines(databaseTxt + "databases.txt", database);
        }
    }
    else
    {
        MessageBox.Show("Fajl koji ste izabrali nije Firebird baza (.FDB)");
        e.Cancel = true;
    }                        
}

现在，我想创建更多按钮来打开同一文件对话框。问题是我想将 openFileDialog 目录传递给不同的文本框。所以逻辑是这样的：

如果我用 button1 打开，将值传递给 textbox1，如果我用 button2 打开，将值传递给 textbox2，如果我用 button3 打开，将值传递给 textbox3。

所以我想创建 int check (1, 2, 3) 所以当我按下按钮 1 时，它会将 check = 1 传递给 OpenDialog1_FileOk，所以我只是在那里切换并执行操作。

问题是我不知道如何将它传递给处理程序，如果可能的话。另外如果有其他解决办法，请写出来

Answer 1

您可以使用私有字段，在其中临时保存 TextBox 的文本并将其部署在点击事件中，如下所示：

private int whichButton = 0;

private void button1_Click(object sender, EventArgs e)
{
    whichButton = 1;
    openFileDialog1.ShowDialog();
}


private void button2_Click(object sender, EventArgs e)
{
    whichButton = 2;
    openFileDialog1.ShowDialog();
}


private void button3_Click(object sender, EventArgs e)
{
    whichButton = 3;
    openFileDialog1.ShowDialog();
}

然后使用whichButton选择

private void openFileDialog1_FileOk(object sender, CancelEventArgs e)
{ 
    switch (whichButton)
    {
         ....
    }


}

Answer 2

首先，您可以像这样使用您的 openfiledialog，而无需为其处理一个全新的函数：

if(openFileDialog1.ShowDialog() == DialogResult.OK){
    //...code
}

其次，为了您的目标，您必须确保您的控件名称以您想要的数字结尾（例如 "button1" 和 "textbox1"）。然后你可以这样做：

void Button1Click(object sender, EventArgs e)
    {

        //MessageBox.Show(bt.Name[bt.Name.Length - 1].ToString());
        if(openFileDialog1.ShowDialog() == DialogResult.OK)
        {

            if(!Path.GetExtension(openFileDialog1.FileName).EndsWith(".FDB"))  //checking if the extension is .FDB (as you've shown in your example)
            {   
                MessageBox.Show("Fajl koji ste izabrali nije Firebird baza (.FDB)");
                return; //return if it's not and no further code gets executed
            }

            string fileDirectory = Path.GetDirectoryName(openFileDialog1.FileName); //getting the directory
            string nameOfMyButton = (sender as Button).Name;    //you get the name of your button
            int lastDigitOfMyName = Convert.ToInt16(Name[Name.Length - 1]); //returns the number of your button
            TextBox neededTextboxToShowDirectory = this.Controls.Find("textbox" + lastDigitOfMyName, true).FirstOrDefault() as TextBox; //this will search for a control with the name "textbox1"
            neededTextboxToShowDirectory.Text = fileDirectory; //you display the text
            //... doing the rest of your stuff here
        }
    }

将值传递给处理程序

passing value to handler

c#

fileopendialog

winforms