datagrid合并单元格

Question

if (string.Compare(strTemp,dg.Items[j].Cells[compareColumn].Text) == 0) 
为什么在判断的时候为什么总是相等啊，明明数据库中有不同的列，可是总是判断不了始终为0

Answer 1

dg.Items[j].Cells[compareColumn].Text 这个地方 的comparecolumn有问题吧 超出界限没有值导致的吧

Answer 2

应该是dg.Rows[j].Cells[compareColumn].Value.toString()
吧

Answer 3

for(int i=0;i<dg.Items.Count;i++)
   {
    if (dg.Items[i].Cells[3].Text.Trim()=="0" && dg.Items[i].Cells[4].Text.Trim()=="0" )
    {
     dg.Items[i].Cells[2].ColumnSpan=3;
     dg.Items[i].Cells[3].Visible=false;
     dg.Items[i].Cells[4].Visible=false;
    }
  }private void spanRow(DataGrid dg,int GroupColumn,int compareColumn) 
        { 
            int i = 0; 
            int j = 0; 
            int rowSpan; 
            string strTemp = ""; 
            for(i=0;i<dg.Items.Count;i++) 
            { 
                rowSpan = 1; 
                strTemp = dg.Items[i].Cells[compareColumn].Text; 
                for (j=i+1;j<dg.Items.Count;j++) 
                { 
                    if (string.Compare(strTemp,dg.Items[j].Cells[compareColumn].Text) == 0) 
                    { 
                        rowSpan += 1; 
                        dg.Items[i].Cells[GroupColumn].RowSpan = rowSpan; 
                        dg.Items[j].Cells[GroupColumn].Visible = false; 
                    } 
                    else 
                    { 
                        break; 
                    } 
                } 
                i = j -1; 
            } 
        } 

Answer 4

就是if语句判断的那句，始终都是相等，即使我人为设定dg.Items.Count数值，也是相等，情高手帮帮忙，着急，弄了两天了