一：查询数据库表中字段的类型语句
SELECT CASE WHEN col.colorder = 1 THEN obj.name
ELSE ''
END AS 表名,
col.colorder AS 序号 ,
col.name AS 列名 ,
ISNULL(ep.[value], '') AS 列说明 ,
t.name AS 数据类型 ,
col.length AS 长度 ,
ISNULL(COLUMNPROPERTY(col.id, col.name, 'Scale'), 0) AS 小数位数 ,
CASE WHEN COLUMNPROPERTY(col.id, col.name, 'IsIdentity') = 1 THEN '1'
ELSE ''
END AS 标识 ,
CASE WHEN EXISTS ( SELECT 1
FROM dbo.sysindexes si
INNER JOIN dbo.sysindexkeys sik ON si.id = sik.id
AND si.indid = sik.indid
INNER JOIN dbo.syscolumns sc ON sc.id = sik.id
AND sc.colid = sik.colid
INNER JOIN dbo.sysobjects so ON so.name = si.name
AND so.xtype = 'PK'
WHERE sc.id = col.id
AND sc.colid = col.colid ) THEN '1'
ELSE ''
END AS 主键 ,
CASE WHEN col.isnullable = 1 THEN '1'
ELSE ''
END AS 允许空 ,
ISNULL(comm.text, '') AS 默认值
FROM dbo.syscolumns col
LEFT JOIN dbo.systypes t ON col.xtype = t.xusertype
inner JOIN dbo.sysobjects obj ON col.id = obj.id
AND obj.xtype = 'U'
AND obj.status >= 0
LEFT JOIN dbo.syscomments comm ON col.cdefault = comm.id
LEFT JOIN sys.extended_properties ep ON col.id = ep.major_id
AND col.colid = ep.minor_id
AND ep.name = 'MS_Description'
LEFT JOIN sys.extended_properties epTwo ON obj.id = epTwo.major_id
AND epTwo.minor_id = 0
AND epTwo.name = 'MS_Description'
WHERE obj.name = ''--表名
ORDER BY col.colorder ;
效果图：
二：帮助类
主要判断Excel表格中字段类型和数据库中的字段类型 ，（使用插件aspose.cells）
public class DataTypeHelper
{
public static bool IsCanConvert(string str, DataColumn col)
{
if (col.DataType.Name.ToLower() == "decimal")
{
try
{
if (str == "IsDecimal" || str == "IsNumeric")
{
return true;
}
return false;
}
catch (Exception)
{
return false;
}
}
if (col.DataType.Name.ToLower() == "string")
{
try
{
if (str == "IsString")
{
return true;
}
return false;
}
catch (Exception)
{
return false;
}
}
if (col.DataType.Name.ToLower() == "int")
{
try
{
if (str == "IsInt")
{
return true;
}
return false;
}
catch (Exception)
{
return false;
}
}
if (col.DataType.Name.ToLower() == "datetime")
{
try
{
if (str == "IsDateTime")
{
return true;
}
return false;
}
catch (Exception)
{
return false;
}
}
return false;
}
}
三：业务处理代码：
1.拼接一条查询返回Excel对应表中的第一条数据：
string dd = Context.Config.InsertSql;
string[] a1 = dd.Split(')');
string[] b = a1[0].Split('(');
string c = b[0].Replace("insert", "").Replace("into", "").Trim();
//查询出一条记录
string strSql = "select top 1 " + b[1] + " from " + c;
2.循环判断：
DataTable dt1 = new DataTable();
dt1 = ISS.DataAccess.DbHelper.ExecuteDataSetBySql("SheetConncetionKey", strSql).Tables[0];
//取到Sheet中的值 循环列
int i1 = 0;
for (int j = Context.Config.DataStartCol; j < Context.Config.DataEndCol + 1; j++)
{
for (int m = Context.Config.DataStartRow + 1; m < Context.Config.DataEndRow + 1; m++)
{
if (endRows > Context.Config.DataStartRow + 1)
{
string ss = Context.Worksheet.Cells[m, j].Type.ToString();
if (Context.Worksheet.Cells.Columns[j].IsHidden)
continue;
if (Context.Worksheet.Cells[Context.Config.DataStartRow, j].StringValue.Trim().ToLower() == "name".ToLower())
{
//找到财务费用的行 赋值给j 13
continue;
}
if (ss == "IsNull")
{
continue;
}
DataColumn dc = dt1.Columns[i1];
if (!DataTypeHelper.IsCanConvert(Context.Worksheet.Cells[m, j].Type.ToString(), dt1.Columns[i1]) && Context.Worksheet.Cells[m, j].Type.ToString() != "IsNull")
{
errorList.Add(wb.Worksheets[i].Name + "单元格中" + (Convert.ToInt32(m) + 1) + "行" + Context.Worksheet.Cells[m, j].Name + "列" + "数据格式不匹配,内容为：" + Context.Worksheet.Cells[m, j].Value.ToString());
}
}
}
i1++;
}
效果：
