比较数据行VB中的值

Question

我想比较两个datarows行和row1中的值。但是这段代码是生成错误

For Each row As DataRow In dt.Rows
    For Each row1 As DataRow In tmpdt.Rows
        If row["STATE"].Tostring() = row1["STATE"].Tostring() Then

        End If
    Next
Next

错误：

  

类型的值＆＃39; System.Data.DataRow＆＃39;无法转换为＆＃39;布尔＆＃39;

Answer 1

使用圆括号void insert_beg(struct node **header_dptr) #A double pointer { header = *header_dptr temp=(struct node*)malloc(sizeof(struct node)); int data_value; printf("Enter the value\n"); scanf("%d",&data_value); temp->info=data_value; if(header==NULL)//when there is no node { header=temp; header->link=temp; } else//when atleast one node has been created { ptr=header->link;//ptr is pointing to where header was pointing. header->link=temp; temp->link=ptr; } printf("\n\n"); } 代替()

这样可行：

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