C# Winform DataGridView控件即时计算金额问题

Question

C# Winform DataGridView控件中,如何修改变数量后,立即计算金额,而不是焦点离开数量单元格才计算金额(数量x单价=金额)?

需要在什么事件中写代码?才会有即时计算效果?

Answer 1

C# Winform DataGridView控件中,如何修改变数量后,立即计算金额,而不是焦点离开数量单元格才计算金额(数量x单价=金额)?

需要在什么事件中写代码?才会有即时计算效果?

想实类似TextBox控件中TextChanged事件的效果,当值一改变(此时焦点没改变)立即触发事件去改变金额的值.

Answer 2

 public partial class Form1 : Form
    {
        private int rowIndex = 0;

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            DataTable dt = new DataTable();
            dt.Columns.Add("数量", typeof(int));
            dt.Columns.Add("单价", typeof(int));
            dt.Columns.Add("总价", typeof(int));


            //随机生成数据
            Random r = new Random(Guid.NewGuid().GetHashCode());
            for (int i = 1; i < 11; i++)
            {
                dt.Rows.Add(r.Next(1, 6), r.Next(1000, 2001));
            }
            dataGridView1.DataSource = dt;
            dataGridView1.EditingControlShowing += dataGridView1_EditingControlShowing;
        }

        void dataGridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
        {
            if (e.Control is DataGridViewTextBoxEditingControl)
            {
                DataGridViewTextBoxEditingControl dc = e.Control as DataGridViewTextBoxEditingControl;
                dc.TextChanged += dc_TextChanged;
                rowIndex = dc.EditingControlRowIndex;
            }
        }

        void dc_TextChanged(object sender, EventArgs e)
        {
            DataGridViewTextBoxEditingControl c= sender as DataGridViewTextBoxEditingControl;
            dataGridView1.Rows[rowIndex].Cells[2].Value = Convert.ToInt32(c.Text) * Convert.ToInt32(dataGridView1.Rows[rowIndex].Cells[1].Value);
        }
       
    }

假设你的界面上只有一个dataGridView控件。

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Answer 3

 public partial class Form1 : Form
    {
        private int rowIndex = 0;

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            DataTable dt = new DataTable();
            dt.Columns.Add("数量", typeof(int));
            dt.Columns.Add("单价", typeof(int));
            dt.Columns.Add("总价", typeof(int));


            //随机生成数据
            Random r = new Random(Guid.NewGuid().GetHashCode());
            for (int i = 1; i < 11; i++)
            {
                dt.Rows.Add(r.Next(1, 6), r.Next(1000, 2001));
            }
            dataGridView1.DataSource = dt;
            dataGridView1.EditingControlShowing += dataGridView1_EditingControlShowing;
        }

        void dataGridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
        {
            if (e.Control is DataGridViewTextBoxEditingControl)
            {
                DataGridViewTextBoxEditingControl dc = e.Control as DataGridViewTextBoxEditingControl;
                dc.TextChanged += dc_TextChanged;
                rowIndex = dc.EditingControlRowIndex;
            }
        }

        void dc_TextChanged(object sender, EventArgs e)
        {
            DataGridViewTextBoxEditingControl c= sender as DataGridViewTextBoxEditingControl;
            dataGridView1.Rows[rowIndex].Cells[2].Value = Convert.ToInt32(c.Text) * Convert.ToInt32(dataGridView1.Rows[rowIndex].Cells[1].Value);
        }
       
    }

假设你的界面上只有一个dataGridView控件。

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      谢谢编程志愿者!太给力了!

Answer 4

不必谢，互帮互助，欢迎常来！可以的话不要忘记标记答案……

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下载MSDN桌面工具(Vista,Win7)
我的博客园
慈善点击，点击此处