从不同的线程填充datagridview列 [英] Fill datagridview Column from different thread

问题描述

如何在不同线程的特定列值的datagridview中填充值。



委托更新文本框值但不是gridview。



我尝试使用委托线程但它没有更新。



当我在委托方法中检查RowCount的值时，RowCount总是一个。但是在mainform上Rowcount是正确的。



如何在datagrid中逐行更新



我试过以下代码

How to fill value in datagridview of a particular column value from different thread.

Delegate Updates textbox values but not gridview.

I tried using delegate thread but it does not update.

When I check the value of RowCount in delegate method RowCount is always one.but on mainform Rowcount is correct.

How to update row by row value in datagrid

I tried following code

threadclass
    {
    void Run ( )
        {
        for ( int i = 0; ( i <= 10 ); i++ )
            {
            SR = i;
            Value = i.ToString ( );
 
            Program.MainFormObj.Datagridview1.Invoke ( 
                new Del_WriteValueToGridView ( 
                        WriteToGridView ), 
                SR, 
                Value );
            }
        }
 

    void WriteToGridView ( int    count,
                           string Value)
        {
                                    //column 1
        Program.Form2Obj.DataGridView1.
                         Rows [ count ].
                         Cells [ 1 ].Value = Value;
        }
    }

我也尝试在mainform中使用writeValueTogridview（）方法，然后在

threadclass中直接调用此方法但不行。

I also tried writeValueTogridview() method in mainform and then directly calling this method in
threadclass but not work.

推荐答案

要从不同的线程写入，你必须使用委托：这是你如何实现你的目标：

Hi,

To write from a diffrent thread you have to use delegates: here is how you can achive your goal:

dataGridView1.Invoke((MethodInvoker)delegate
            {
                dataGridView1.DataSource = null;
                dataGridView1.DataSource = myList.ToList();
            });

我在执行任何操作之前通常将datagridview设置为null，以确保重新绘制dataGrid。



i尝试使用dataGridView1.Refresh（），Repaint（）......什么都行不通。



刷新dataGridView的最佳方法是如前所述。



希望它有所帮助。



PS：你可以以不同的方式使用代表，但这一个通常是最简单/最快的。



顺便说一下，既然您已经实现了委托，那么您必须确保在表单关闭之前终止该线程，否则您将遇到异常。

I generaly set the datagridview to null before doing any kind of operation to be sure the dataGrid is repainted.

i tryed using dataGridView1.Refresh(), Repaint() ... nothing works.

the best method to refresh a dataGridView is to do as described earlier.

Hope it helps.

PS: you can use delegates in diffrents way, but this one is generaly the easiest/fastest.

By the way, Now that you have implemented delegates, you have to make sure the thread is terminated before the form is closed, otherwise you will have an exception.

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