指定Null值在DataTable中的整数列 [英] Assign Null value to the Integer Column in the DataTable

问题描述

我有一个的ColumnName客户ID与整数数据类型，一个DataTable。
动态我要行添加到数据表。对于这一点，我已经创建了一个DataRow对象，如：

I have a datatable with One ColumnName "CustomerID" with Integer DataType. Dynamically I want to add rows to the DataTable. For that, I had created one DataRow object like:

  DataTable dt = new DataTable();
  DataRow DR = dt.NewRow();
  DR["CustomerID"] = Convert.ToInt32(TextBox1.Text);

但是，如果文本框包含空字符串，它抛出的错误。在这种情况下，我想Null值分配给客户ID。如何做到这一点？

But if the TextBox contains empty string, it throws the error. In that case, I want to assign Null value to the CustomerID. How to do this?

推荐答案

一个空/空字符串格式错误;您将需要检测的场景和补偿：

A null/empty string is in the wrong format; you would need to detect that scenario and compensate:

    DR["CustomerID"] = string.IsNullOrWhiteSpace(text)
        ? DBNull.Value : (object)Convert.ToInt32(text);

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