C# gridview行和列合并

我在datatable中有以下格式的数据，我正试图将其绑定到gridview（格式-1）

在有了数据绑定后，我得到了以下格式的gridview（格式-2）

但我正在寻找以下数据格式，以便在gridview（格式3）

下面的代码用于grdiview中的Ondatabound事件

   for (int i = gvConversionGrid.Rows.Count - 1; i > 0; i--)
   {
        GridViewRow row = gvConversionGrid.Rows[i];
        GridViewRow previousRow = gvConversionGrid.Rows[i - 1];
        for (int j = 0; j < row.Cells.Count; j++)
        {
            if (row.Cells[j].Text == previousRow.Cells[j].Text)
            {
                if (previousRow.Cells[j].RowSpan == 0)
                {
                    if (row.Cells[j].RowSpan == 0)
                    {
                        previousRow.Cells[j].RowSpan += 2;
                    }
                    else
                    {
                        previousRow.Cells[j].RowSpan = row.Cells[j].RowSpan + 1;
                    }
                    row.Cells[j].Visible = false;
                }
            }
        }
   }

for（int i=gvConversionGrid.Rows.Count-1；i>0；i--）
{
GridViewRow行=gvConversionGrid.Rows[i]；
GridViewRow-previousRow=gvConversionGrid.Rows[i-1]；
对于（int j=0；j

是否有任何方法可以操作gridview并将gridview数据的格式设置为格式-3

请任何人帮我解答这个问题，我会非常感激的。。 非常感谢

更新：我正在寻找以下格式的图像

---

您可以插入两个隐藏列

 Id     col1    col2  groupindex  groupcount
 20      a     1      1         4
 20      a     2      2         4
 20      a     3      3         4
 20      a     4      4         4
 21      a     1      1         5
 21      a     2      2         5
 21      a     3      3         5
 21      a     4      4         5
 21      a     5      5         5

并设置行跨度：

 void GridView_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow )
    {

        // set rowspan for the first row of group
        if (Convert.ToInt32(e.Row.Cells[3]) == 1)
        {
            var rowSpan = Convert.ToString(e.Row.Cells[4]);
            e.Row.Cells[0].Attributes.Add("rowspan", rowSpan);
            e.Row.Cells[1].Attributes.Add("rowspan", rowSpan);
        }
        else
        {
            e.Row.Cells[0].Visible = false;
            e.Row.Cells[1].Visible = false;
        }
    }
}

---

您可以将上一个

Id

值设置为在方法外部声明的变量，并将当前行与GridView的

OnRowDataBound

事件中的行进行比较

string previousCellValue = "";

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
    //check if the row is a datarow
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        //cast the dataitem back to a row
        DataRowView row = e.Row.DataItem as DataRowView;

        //check if the current id matches the previous row
        if (previousCellValue == row["Id"].ToString())
        {
            //clear the first cell
            e.Row.Cells[0].Text = "";

            //apply column span
            e.Row.Cells[0].ColumnSpan = 2;
            e.Row.Cells[1].Visible = false;
        }
        else
        {
            previousCellValue = row["Id"].ToString();
        }
    }
}

结果:

更新

string previousCellValue = "";
int previousCellCount = 1;

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
    //check if the row is a datarow and not the first row
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        //cast the dataitem back to a row
        DataRowView row = e.Row.DataItem as DataRowView;

        //check if the current id matches the previous row
        if (previousCellValue == row["Id"].ToString())
        {
            //count the number of same cells
            previousCellCount++;
        }
        else
        {
            //span the rows for the first two cells
            if (previousCellCount > 1)
            {
                GridView1.Rows[e.Row.RowIndex - previousCellCount].Cells[0].RowSpan = previousCellCount;
                GridView1.Rows[e.Row.RowIndex - previousCellCount].Cells[1].RowSpan = previousCellCount;

                //hide the other cells in the column
                for (int i = 1; i < previousCellCount; i++)
                {
                    GridView1.Rows[(e.Row.RowIndex - previousCellCount) + i].Cells[0].Visible = false;
                    GridView1.Rows[(e.Row.RowIndex - previousCellCount) + i].Cells[1].Visible = false;
                }
            }

            previousCellValue = row["Id"].ToString();
            previousCellCount = 1;
        }
    }
    else if (e.Row.RowType == DataControlRowType.Footer)
    {
        //use the footer row to create spanning for the last rows if needed
        if (previousCellCount > 1)
        {
            GridView1.Rows[GridView1.Rows.Count - previousCellCount].Cells[0].RowSpan = previousCellCount;
            GridView1.Rows[GridView1.Rows.Count - previousCellCount].Cells[1].RowSpan = previousCellCount;

            //hide the other cells in the column
            for (int i = 1; i < previousCellCount; i++)
            {
                GridView1.Rows[(GridView1.Rows.Count - previousCellCount) + i].Cells[0].Visible = false;
                GridView1.Rows[(GridView1.Rows.Count - previousCellCount) + i].Cells[1].Visible = false;
            }
        }
    }
}

字符串previousCellValue=“”；
int-previousCellCount=1；
受保护的void GridView1_RowDataBound（对象发送方，GridViewRowEventArgs e）
{
//检查该行是否为datarow，而不是第一行
如果（e.Row.RowType==DataControlRowType.DataRow）
{
//将数据项强制转换回行
DataRowView行=e.row.DataItem作为DataRowView；
//检查当前id是否与上一行匹配
if（previousCellValue==行[“Id”].ToString（））
{
//计算相同单元格的数量
previousCellCount++；
}
其他的
{
//跨越前两个单元格的行
如果（上一个单元格计数>1）
{
GridView1.Rows[e.Row.RowIndex-previousCellCount]。单元格[0]。RowSpan=previousCellCount；
GridView1.Rows[e.Row.RowIndex-previousCellCount]。单元格[1]。RowSpan=previousCellCount；
//隐藏列中的其他单元格
对于（int i=1；i1）
{
GridView1.Rows[GridView1.Rows.Count-previousCellCount]。单元格[0]。RowSpan=previousCellCount；
GridView1.Rows[GridView1.Rows.Count-previousCellCount]。单元格[1]。RowSpan=previousCellCount；
//隐藏列中的其他单元格
对于（int i=1；i

结果:

---

是否完全不可能，是否有人对此合并行有任何建议..格式1是否来自一个表？它应该只绑定到一个GridView吗？？？@Asif.Ali它只是一个表单数据表。。。。是的，它只绑定到一个gridview…所有行的col1值都相同，只有Id和col2不同？@Asif.Ali抱歉，我无法为您获取所有行的col1值都相同的意思？我在onDataBound中进行了该操作。。您在rowDataBound事件中正确地指定了方法。是的，它是OnRowDataBound事件。但我在第二列中只得到一个“a”。。我不明白你最后的评论，你能建议做些什么改变吗。我的代码片段将产生您所指出的确切结果。请看添加的屏幕截图。我在问题中附上了图片，您能建议对该图片进行任何更改以获得网格形式的图片吗..谢谢您的建议。。我需要在哪里插入组索引和组计数，以及如何将其填充到gridview。。。

 void GridView_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow )
    {

        // set rowspan for the first row of group
        if (Convert.ToInt32(e.Row.Cells[3]) == 1)
        {
            var rowSpan = Convert.ToString(e.Row.Cells[4]);
            e.Row.Cells[0].Attributes.Add("rowspan", rowSpan);
            e.Row.Cells[1].Attributes.Add("rowspan", rowSpan);
        }
        else
        {
            e.Row.Cells[0].Visible = false;
            e.Row.Cells[1].Visible = false;
        }
    }
}

string previousCellValue = "";

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
    //check if the row is a datarow
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        //cast the dataitem back to a row
        DataRowView row = e.Row.DataItem as DataRowView;

        //check if the current id matches the previous row
        if (previousCellValue == row["Id"].ToString())
        {
            //clear the first cell
            e.Row.Cells[0].Text = "";

            //apply column span
            e.Row.Cells[0].ColumnSpan = 2;
            e.Row.Cells[1].Visible = false;
        }
        else
        {
            previousCellValue = row["Id"].ToString();
        }
    }
}

string previousCellValue = "";
int previousCellCount = 1;

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
    //check if the row is a datarow and not the first row
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        //cast the dataitem back to a row
        DataRowView row = e.Row.DataItem as DataRowView;

        //check if the current id matches the previous row
        if (previousCellValue == row["Id"].ToString())
        {
            //count the number of same cells
            previousCellCount++;
        }
        else
        {
            //span the rows for the first two cells
            if (previousCellCount > 1)
            {
                GridView1.Rows[e.Row.RowIndex - previousCellCount].Cells[0].RowSpan = previousCellCount;
                GridView1.Rows[e.Row.RowIndex - previousCellCount].Cells[1].RowSpan = previousCellCount;

                //hide the other cells in the column
                for (int i = 1; i < previousCellCount; i++)
                {
                    GridView1.Rows[(e.Row.RowIndex - previousCellCount) + i].Cells[0].Visible = false;
                    GridView1.Rows[(e.Row.RowIndex - previousCellCount) + i].Cells[1].Visible = false;
                }
            }

            previousCellValue = row["Id"].ToString();
            previousCellCount = 1;
        }
    }
    else if (e.Row.RowType == DataControlRowType.Footer)
    {
        //use the footer row to create spanning for the last rows if needed
        if (previousCellCount > 1)
        {
            GridView1.Rows[GridView1.Rows.Count - previousCellCount].Cells[0].RowSpan = previousCellCount;
            GridView1.Rows[GridView1.Rows.Count - previousCellCount].Cells[1].RowSpan = previousCellCount;

            //hide the other cells in the column
            for (int i = 1; i < previousCellCount; i++)
            {
                GridView1.Rows[(GridView1.Rows.Count - previousCellCount) + i].Cells[0].Visible = false;
                GridView1.Rows[(GridView1.Rows.Count - previousCellCount) + i].Cells[1].Visible = false;
            }
        }
    }
}