C# 子窗口窗体在gridview上不显示颜色方案

我设计了一个表单，在datagridview上显示颜色方案（交替行）。它工作得很好。但当我从mdi父窗体菜单条选项卡调用它时，它不会在datagridview（在窗体加载函数中填充）上显示颜色。当我运行独子窗体时，它会在gridview3和datagridview4.like上显示颜色

但当我从父级调用时，它在datagridview3（备用行）和datagridview4（备用行）中不显示颜色。 看起来像

private void Form1\u加载（对象发送方，事件参数e）
{
comboBox1.SelectedItem=“选择性别”；
使用（SqlConnection con=新SqlConnection（conn））
{
SqlDataAdapter sda=新的SqlDataAdapter（“getdata”，con）；
sda.SelectCommand.CommandType=CommandType.StoredProcess；
数据集ds=新数据集（）；
sda.填充（ds）；
ds.Tables[0].TableName=“产品”；
ds.Tables[1].TableName=“Category”；
dataGridView3.DataSource=ds.Tables[“产品”]；
dataGridView4.DataSource=ds.Tables[“Category”]；
}
gridrowcolor（）；
}
公共void gridrowcolor（）
{
DataGridViewCellStyle st=新的DataGridViewCellStyle（）；
st.Font=新字体（“Arial”，12，FontStyle.Bold）；
对于（int i=0；i

假设您已经发布了子表单的代码，并且您的应用程序设置为MDI parent，并且您有数据。您应该使用DataGridView的OnBindingComplete事件调用gridrowcolor（）；从那里开始。这应该行得通

    Form1_Load()
    {

    dataGridView4.OnBindingComplete += SetGridViewRows;
    ... // the rest of your code...

    }

SetGridViewRows(object sender, BindingCompleteEventArgs e)
{

    DataGridViewCellStyle st = new DataGridViewCellStyle();
    st.Font = new Font("Arial", 12, FontStyle.Bold);

    for (int i = 0; i < dataGridView4.Rows.Count-1; i++)
    {
        //dataGridView4.RowsDefaultCellStyle.BackColor = Color.Orange;
        //dataGridView4.AlternatingRowsDefaultCellStyle.BackColor = Color.BurlyWood;

        int ii = Convert.ToInt32(dataGridView4.Rows[i].Cells[0].Value.ToString());
        if (ii % 2 == 0)
        {
            dataGridView4.Rows[i].DefaultCellStyle.BackColor = Color.Gray;
            dataGridView4.Rows[i].DefaultCellStyle = st;
        }
        else
            dataGridView4.Rows[i].DefaultCellStyle.BackColor = Color.Brown;
    }


}

Form1_Load（）
{
dataGridView4.OnBindingComplete+=SetGridViewRows；
…//剩下的代码。。。
}
SetGridViewRows（对象发送器，BindingCompleteEventArgs e）
{
DataGridViewCellStyle st=新的DataGridViewCellStyle（）；
st.Font=新字体（“Arial”，12，FontStyle.Bold）；
对于（int i=0；i

上面的代码（为了简洁起见，我复制了这些代码）实际上可以使用同一个事件（仅使用sender和eventargs）。 我不建议使用CellFormatEvent，因为根据您正在做的其他事情，该方法可能会被调用两次。 使用DataGridView的BindingCompleteEvent应该可以解决问题

编辑 好的，我为您编写了代码：

Form1_Load()
{
    // This method subscribes to the DataGridView Binding Complete Event. Only after DdataBinding is Complete
        // For example when you do this dataGridView3.DataSource = MySource; or dataGridView3.ResetBindings(false);
       dataGridView3.DataBindingComplete += dataGridView3_DataBindingComplete;

       // This Method Subscribes to the Cell Formatting event - will be called when formatting the Cells!
    dataGridView3.CellFormatting += new DataGridViewCellFormattingEventHandler(dataGridView3_CellFormatting);

// All of my other code that I have in the load event..

}

// This is called when Databinding is complete 
        private void dataGridView3_DataBindingComplete(object sender, DataGridViewBindingCompleteEventArgs e)
        {
            dgBinContent.ClearSelection();

            DataGridView myGrid = (DataGridView)sender;
            for (int i = 0; i < myGrid.Rows.Count - 1; i++)
            {


                myGrid.CellBorderStyle = DataGridViewCellBorderStyle.None;
                DataGridViewCellStyle style = new DataGridViewCellStyle();
                style.Font = new System.Drawing.Font(myGrid.Font, System.Drawing.FontStyle.Bold);

                int ii = Convert.ToInt32(myGrid.Rows[i].Cells[0].Value.ToString());
                if (ii % 2 == 0)
                {
                    myGrid.Rows[i].DefaultCellStyle.BackColor = System.Drawing.Color.Yellow;
                    myGrid.Rows[i].DefaultCellStyle = style;
                    myGrid.DefaultCellStyle.SelectionForeColor = System.Drawing.Color.Chocolate;
                }
                else
        {
                    myGrid.Rows[i].DefaultCellStyle.BackColor = System.Drawing.Color.Orange;
        }
            }

         }

// This is called when Cell Formatting
        void dataGridView3_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
        {
            this.dataGridView3.Rows[e.RowIndex].HeaderCell.Value = String.Format("{0}", e.RowIndex + 1);

            dataGridView3.CellBorderStyle = DataGridViewCellBorderStyle.None;
            DataGridViewCellStyle style = new DataGridViewCellStyle();
            style.Font = new System.Drawing.Font(dataGridView3.Font, System.Drawing.FontStyle.Bold);

            int ii = Convert.ToInt32(dataGridView3.Rows[e.RowIndex].Cells[0].Value.ToString());
            if (ii % 2 == 0)
            {
                dataGridView3.Rows[e.RowIndex].DefaultCellStyle.BackColor = System.Drawing.Color.Yellow;
                dataGridView3.Rows[e.RowIndex].DefaultCellStyle = style;
                dataGridView3.DefaultCellStyle.SelectionForeColor = System.Drawing.Color.Chocolate;
            }
            else
            {
                dataGridView3.Rows[e.RowIndex].DefaultCellStyle.BackColor = System.Drawing.Color.Orange;
            }

        }

Form1_Load（）
{
//此方法订阅DataGridView绑定完成事件。仅在DdataBinding完成后
//例如，执行此操作时，dataGridView3.DataSource=MySource；或dataGridView3.ResetBindings（false）；
dataGridView3.DataBindingComplete+=dataGridView3_DataBindingComplete；
//此方法订阅单元格格式化事件-将在格式化单元格时调用！
dataGridView3.CellFormatting+=新的DataGridViewCellFormattingEventHandler（dataGridView3\u CellFormatting）；
//加载事件中的所有其他代码。。
}
//当数据绑定完成时调用
私有void dataGridView3_DataBindingComplete（对象发送方，DataGridViewBindingCompleteEventTarget）
{
dgBinContent.ClearSelection（）；
DataGridView myGrid=（DataGridView）发送方；
对于（int i=0；iForm1_Load()
{
    // This method subscribes to the DataGridView Binding Complete Event. Only after DdataBinding is Complete
        // For example when you do this dataGridView3.DataSource = MySource; or dataGridView3.ResetBindings(false);
       dataGridView3.DataBindingComplete += dataGridView3_DataBindingComplete;

       // This Method Subscribes to the Cell Formatting event - will be called when formatting the Cells!
    dataGridView3.CellFormatting += new DataGridViewCellFormattingEventHandler(dataGridView3_CellFormatting);

// All of my other code that I have in the load event..

}

// This is called when Databinding is complete 
        private void dataGridView3_DataBindingComplete(object sender, DataGridViewBindingCompleteEventArgs e)
        {
            dgBinContent.ClearSelection();

            DataGridView myGrid = (DataGridView)sender;
            for (int i = 0; i < myGrid.Rows.Count - 1; i++)
            {


                myGrid.CellBorderStyle = DataGridViewCellBorderStyle.None;
                DataGridViewCellStyle style = new DataGridViewCellStyle();
                style.Font = new System.Drawing.Font(myGrid.Font, System.Drawing.FontStyle.Bold);

                int ii = Convert.ToInt32(myGrid.Rows[i].Cells[0].Value.ToString());
                if (ii % 2 == 0)
                {
                    myGrid.Rows[i].DefaultCellStyle.BackColor = System.Drawing.Color.Yellow;
                    myGrid.Rows[i].DefaultCellStyle = style;
                    myGrid.DefaultCellStyle.SelectionForeColor = System.Drawing.Color.Chocolate;
                }
                else
        {
                    myGrid.Rows[i].DefaultCellStyle.BackColor = System.Drawing.Color.Orange;
        }
            }

         }

// This is called when Cell Formatting
        void dataGridView3_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
        {
            this.dataGridView3.Rows[e.RowIndex].HeaderCell.Value = String.Format("{0}", e.RowIndex + 1);

            dataGridView3.CellBorderStyle = DataGridViewCellBorderStyle.None;
            DataGridViewCellStyle style = new DataGridViewCellStyle();
            style.Font = new System.Drawing.Font(dataGridView3.Font, System.Drawing.FontStyle.Bold);

            int ii = Convert.ToInt32(dataGridView3.Rows[e.RowIndex].Cells[0].Value.ToString());
            if (ii % 2 == 0)
            {
                dataGridView3.Rows[e.RowIndex].DefaultCellStyle.BackColor = System.Drawing.Color.Yellow;
                dataGridView3.Rows[e.RowIndex].DefaultCellStyle = style;
                dataGridView3.DefaultCellStyle.SelectionForeColor = System.Drawing.Color.Chocolate;
            }
            else
            {
                dataGridView3.Rows[e.RowIndex].DefaultCellStyle.BackColor = System.Drawing.Color.Orange;
            }

        }