在.NET中,将竖表变横表(支持固定列)

Love The Way You Lie 2021-10-24 03:32 211阅读 0赞

竖表变横表(支持固定列)

根据LoveCherry的竖变横方法改进而来  
        public DataTable MakeData(DataTable dt,int iColumnSize,int\[\] iColumnID) //iColumnsize:重复列数 iColumnID 需要横向排列的列的序号数组  
        \{    
            int ColumnCount=iColumnID.Length;  
            int totalRows=dt.Rows.Count;  
            int itmp=dt.Rows.Count%iColumnSize; //行数  
            int iRows; //行数  
            if(itmp==0)  
                iRows=dt.Rows.Count/iColumnSize;  
            else  
                iRows=dt.Rows.Count/iColumnSize+1;  
            DataTable newdt=new DataTable();  
            for(int i=0;i<iColumnSize;i++)  
            \{   
                for(int j=0;j<ColumnCount;j++)  
                \{  string aa=dt.Columns\[iColumnID\[j\]\].ColumnName+i;  
                    int bb=iColumnID\[j\];  
                    DataColumn dc=new DataColumn(dt.Columns\[iColumnID\[j\]\].ColumnName+i,dt.Columns\[iColumnID\[j\]\].DataType);  
                 
                    newdt.Columns.Add(dc);  
                \}  
            \}  
            for(int i=0;i<iRows;i++)  
            \{          
                DataRow dr=newdt.NewRow();  
                for(int j=0;j<iColumnSize;j++)  
                \{  
                    for(int k=0;k<ColumnCount;k++)  
                    \{  
                        if((i+j\*iColumnSize)<dt.Rows.Count)  
                        \{   
                            string aa=dt.Columns\[iColumnID\[k\]\].ColumnName+j;  
                            try  
                            \{  
                                dr\[dt.Columns\[iColumnID\[k\]\].ColumnName+j\]=dt.Rows\[iRows\*j+i\]\[iColumnID\[k\]\];  
                            \}  
                            catch  
                            \{\}  
                        \}  
                    \}  
                \}  
                newdt.Rows.Add(dr);                  
            \}  
            return newdt;  
        \}

转载于:https://www.cnblogs.com/JoinZhang/archive/2006/03/16/351781.html