如何在C＃中的Xml文件中的Tabcontrol中保存所选标签页的内容？ [英] How Can I Save The Contents Of The Selected Tabpage In A Tabcontrol In A Xml File In C#?

问题描述

我有一个tabControl，其中tabPages是在运行时创建的。每个TabPage都包含一个TextBox和一个格式相同的DataGridView。

现在我有一个保存按钮，它应该保存xml文件中当前标签的内容（textbox和datagridview中的值）。 />
但是每当我保存值时，第一个tabPage的内容就会一直保存。我知道我需要使用TabControl.SelectedTab属性，但我无法为其编写代码。

使用下面的代码，我得到以下错误对象引用未设置为实例对象

Hi,

I have a tabControl in which tabPages are created at run-time. Every TabPage contains a TextBox and a DataGridView of the same format.
Now i have a save button which should save the content(values in textbox and datagridview) of the current tab in an xml file.
But whenever i am saving the values, the content of the first tabPage is getting saved all the time. I know that i need to use TabControl.SelectedTab property but i am not able to write the code for it.
Using the code below, i get the following error "Object refernce not set to an instance of the object"

DataGridView dgv = null;
            if (profileTabControl.SelectedTab.Controls.ContainsKey("dgvIsland"))
            {
                dgv = (DataGridView)profileTabControl.SelectedTab.Controls["dgvIsland"];
            }
            DataTable dt = new DataTable();
            foreach (DataGridViewColumn col in dgv.Columns)
            {
                dt.Columns.Add(col.HeaderText);
            }
            foreach (DataGridViewRow row in dgv.Rows)
            {
                DataRow dRow = dt.NewRow();
                foreach (DataGridViewCell cell in row.Cells)
                {
                    dRow[cell.ColumnIndex] = cell.Value;
                }
                dt.Rows.Add(dRow);
            }
            DataSet ds = new DataSet();
            ds.Tables.Add(dt);
            ds.WriteXml(filename);

任何人都可以帮助至少让我知道如何解决上述问题？



谢谢：）

Can anyone please help in atleast letting me know about how to start with the above problem?

Thanks :)

推荐答案

所以在保存事件中，您可以获取当前标签

Hi,

so with in the save event you can get the current tab

TabControl.SelectedTab

但你的挑战会有所不同，就是你会发现每个DataGrid和TextBox，因为每个对象的名称会有所不同。



解决方案：

but your challenge would be something different that is how you will find each DataGrid and TextBox because each object name would be different.

Solution :

foreach(Control Clt in [Your Tab ID].SelectedTab.Controls)
{
   if(Clt is TextBox)
   {
       // Use your operation 
   }
   if(Clt is DataGridView)
   {
      // Use your operation  
   }
}

谢谢

Suvabrata

Thanks
Suvabrata

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