C# Winforms-将新表单直接放置在父级的Datagridview选定行下

我有一个带有DataGridView的表单。我选择一行（始终是单行）数据。单击某个按钮后，我希望打开一个新表单，并始终将其直接放在所选行的下方。我该怎么做

在我的按钮单击中，我执行以下操作：

private void myBtn_Click(object sender, EventArgs e)
    {
        if (myDGV.SelectedCells.Count > 0)
        {
            int i = myDGV.SelectedCells[0].RowIndex;
            DataGridViewRow r = myDGV.Rows[i];

            // READ SOME DATA FROM THE ROW

            newForm form = new newForm();
            //POPULATE THE NEW FORM WITH DATA
            form.ShowDialog(this); //POSITION OF THIS FORM SHOULD BE DIRECTLY UNDER SELECTED ROW
        }
    }

private void myBtn_Click(object sender, EventArgs e)
{
    if (myDGV.SelectedCells.Count > 0)
    {
        int i = myDGV.SelectedCells[0].RowIndex;
        DataGridViewRow r = myDGV.Rows[i];

        // READ SOME DATA FROM THE ROW

        newForm form = new newForm();
        //POPULATE THE NEW FORM WITH DATA ...

        // Position the form under the selected row
        form.StartPosition = FormStartPosition.Manual;
        var rect = myDGV.RectangleToScreen(myDGV.GetRowDisplayRectangle(i, false));
        form.Location = new Point(rect.Left, rect.Bottom);

        form.ShowDialog(this);
    }
}

您可以使用获取数据网格视图客户端坐标中的行矩形，然后将其转换为确定新表单位置所需的屏幕坐标，如下所示：

private void myBtn_Click(object sender, EventArgs e)
    {
        if (myDGV.SelectedCells.Count > 0)
        {
            int i = myDGV.SelectedCells[0].RowIndex;
            DataGridViewRow r = myDGV.Rows[i];

            // READ SOME DATA FROM THE ROW

            newForm form = new newForm();
            //POPULATE THE NEW FORM WITH DATA
            form.ShowDialog(this); //POSITION OF THIS FORM SHOULD BE DIRECTLY UNDER SELECTED ROW
        }
    }

private void myBtn_Click(object sender, EventArgs e)
{
    if (myDGV.SelectedCells.Count > 0)
    {
        int i = myDGV.SelectedCells[0].RowIndex;
        DataGridViewRow r = myDGV.Rows[i];

        // READ SOME DATA FROM THE ROW

        newForm form = new newForm();
        //POPULATE THE NEW FORM WITH DATA ...

        // Position the form under the selected row
        form.StartPosition = FormStartPosition.Manual;
        var rect = myDGV.RectangleToScreen(myDGV.GetRowDisplayRectangle(i, false));
        form.Location = new Point(rect.Left, rect.Bottom);

        form.ShowDialog(this);
    }
}

您可以使用获取数据网格视图客户端坐标中的行矩形，然后将其转换为确定新表单位置所需的屏幕坐标，如下所示：

private void myBtn_Click(object sender, EventArgs e)
    {
        if (myDGV.SelectedCells.Count > 0)
        {
            int i = myDGV.SelectedCells[0].RowIndex;
            DataGridViewRow r = myDGV.Rows[i];

            // READ SOME DATA FROM THE ROW

            newForm form = new newForm();
            //POPULATE THE NEW FORM WITH DATA
            form.ShowDialog(this); //POSITION OF THIS FORM SHOULD BE DIRECTLY UNDER SELECTED ROW
        }
    }

private void myBtn_Click(object sender, EventArgs e)
{
    if (myDGV.SelectedCells.Count > 0)
    {
        int i = myDGV.SelectedCells[0].RowIndex;
        DataGridViewRow r = myDGV.Rows[i];

        // READ SOME DATA FROM THE ROW

        newForm form = new newForm();
        //POPULATE THE NEW FORM WITH DATA ...

        // Position the form under the selected row
        form.StartPosition = FormStartPosition.Manual;
        var rect = myDGV.RectangleToScreen(myDGV.GetRowDisplayRectangle(i, false));
        form.Location = new Point(rect.Left, rect.Bottom);

        form.ShowDialog(this);
    }
}

---

虽然Ivans的解决方案是100%有效和正确的，但就美学而言，它存在一些小的“抱怨”（他可以在优雅的解决方案中轻松满足这些抱怨）。如果希望对话框直接显示在行的下方，与gridview的左侧和行的底部齐平，则需要以不同的方式执行此操作—长距离

我重申这一点——Ivans解决方案非常合适，而且更干净。。下面的解决方案为您提供了更多关于表单放置等方面的自由。我在几分钟内就把它拼凑起来了，如果我错过了一些小东西，我很抱歉

您始终可以使用内置属性，如

Rectangle.Bottom

等。我这样做是为了，我想，展示如何处理事情的数学

private void myBtn_Click(object sender, EventArgs e)
{    
    if(dataGridView1.SelectedRows.Count > 0)
    {
        var rowIndex = myDGV.SelectedRows[0].Index;
        var row = myDGV.Rows[rowIndex];

        var formLocation = this.Location; //Form location
        var gridLocation = myDGV.Location; //grid location
        var rowLocation  = myDGV.GetRowDisplayRectangle(rowIndex, false).Location; //row location

        newForm form = new newForm();

        form.StartPosition     = FormStartPosition.Manual; //set to manual
        //form.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
        //form.BackColor       = Color.Blue;
        form.Location = GetPopupStartingLocation(
            new Point[] 
                { 
                    formLocation, 
                    gridLocation, 
                    rowLocation 
                }, 
            row.Height);

        form.Show(this);
    }
}

/*
A small helper method - didn't need to put this in a method
but I did it for clarity.
*/
 private Point GetPopupStartingLocation(Point[] locations, int rowHeight)
 {
    var yPadding = 5;
    var xValues  = locations.Sum(x => x.X);
    var yValues  = locations.Sum(x => x.Y) + ((rowHeight * 2) + yPadding);

    return new Point(xValues, yValues);
 }

现在，除了“更长的路线”之外，这与Ivan的基本相同，但是这让您可以使用helper函数对您的位置进行更多的控制。您可以添加/删除或调整下面的值，并找到您喜欢的内容。很好

希望这有帮助

---

+1向伊万索要干净的溶液。

虽然伊万的溶液100%有效且正确，但就美学而言，存在一些小的“牢骚”（他可以很容易地在优雅的溶液中满足这些牢骚）。如果希望对话框直接显示在行的下方，与gridview的左侧和行的底部齐平，则需要以不同的方式执行此操作—长距离

我重申这一点——Ivans解决方案非常合适，而且更干净。。下面的解决方案为您提供了更多关于表单放置等方面的自由。我在几分钟内就把它拼凑起来了，如果我错过了一些小东西，我很抱歉

您始终可以使用内置属性，如

Rectangle.Bottom

等。我这样做是为了，我想，展示如何处理事情的数学

private void myBtn_Click(object sender, EventArgs e)
{    
    if(dataGridView1.SelectedRows.Count > 0)
    {
        var rowIndex = myDGV.SelectedRows[0].Index;
        var row = myDGV.Rows[rowIndex];

        var formLocation = this.Location; //Form location
        var gridLocation = myDGV.Location; //grid location
        var rowLocation  = myDGV.GetRowDisplayRectangle(rowIndex, false).Location; //row location

        newForm form = new newForm();

        form.StartPosition     = FormStartPosition.Manual; //set to manual
        //form.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
        //form.BackColor       = Color.Blue;
        form.Location = GetPopupStartingLocation(
            new Point[] 
                { 
                    formLocation, 
                    gridLocation, 
                    rowLocation 
                }, 
            row.Height);

        form.Show(this);
    }
}

/*
A small helper method - didn't need to put this in a method
but I did it for clarity.
*/
 private Point GetPopupStartingLocation(Point[] locations, int rowHeight)
 {
    var yPadding = 5;
    var xValues  = locations.Sum(x => x.X);
    var yValues  = locations.Sum(x => x.Y) + ((rowHeight * 2) + yPadding);

    return new Point(xValues, yValues);
 }

现在，除了“更长的路线”之外，这与Ivan的基本相同，但是这让您可以使用helper函数对您的位置进行更多的控制。您可以添加/删除或调整下面的值，并找到您喜欢的内容。很好

希望这有帮助

---

+1向Ivan索取干净的溶液。

这需要一点数学知识：请检查您的

GridView。位置

，然后获取单击的行的索引（例如，

n

）。然后你的表单位置应该在

（gridview.location.x，gridview.location.Y+headerheight+（n+1）*行高）

中，这需要一点数学知识：请检查你的

gridview.location

，然后点击行的索引（比如，

n

）。那么您的表单位置应该在

（gridview.location.x，gridview.location.Y+headerheight+（n+1）*行高）